Drupal vs Mura

Drupal sort of eats that list alive.

Hm well I can't personally answer whether Mura has those features or not (any more easily than you can, if you install it, investigate, etc). I can say though - Drupal "does" have all those features and more, and also has a thriving community, a wide variety of training materials (videos, books, tutorials, user groups, conferences, etc), nearly countless modules, excellent base themes, a substantial variety of examples of "top level" sites and companies/organizations that have chosen to use and invest heavily in it (e.g. whitehouse.gov and many US government and other country's government sites, Sony, ING, sub-sites on Yahoo, Google, Best Buy, Ikea, eBay, etc, and many others). While admittedly I haven't had time to look hard, I don't see any similar "votes of confidence" of major sites using Mura (conversely, it's easy to find mountains of such examples for Drupal). That's of course not the only reason to choose a product/service, but it certainly helps.

I watched a brief intro video on Mura and it looks like a nice CMS. I personally have zero interest in getting into ColdFusion (I mostly use PHP, and next on my list to learn are Ruby and Python), so in my own case I probably would never choose to use or develop a site with Mura - if it were me and a client insisted on Mura, I would ask them to seek out an alternative developer. If you have interest in ColdFusion and have the time/desire, or feel it would augment your marketable skills as a web developer, then sure go for it. Otherwise, I recommend you focus on maximizing your existing skills.

Mura user/designer here. Shop is CF, so CF CMS made sense. Web developer is liking the integration ability. We are creating pages automatically/populating content from external data sources, authenticating users via Shib/CAS and have created some custom plugins. So far, so good.

Multi-site capability?
Yes, under one install, you can create multiple sites, and can share users/admin users/data between them if you choose.

Customizable content types?
Yes, using the class extension manager, you can create custom input types for all content types.
From the Mura site:
The Class Extension Manager allows you to create subTypes which extend the base types of content (users, pages, portals, etc.) found in Mura. This allows you to create highly structured data by adding new fields/attributes to existing Mura CMS data types.

Products with specific attributes (cost, weight, version number, etc.)
Site Members with specific attributes (gender, age, eye color, favorite ice cream flavor, etc.)
Events with specific attributes (date, location, topic, time, etc.)

http://docs.getmura.com/developer-guides/back-end-development/the-class-...

Ways to remove events after they happen?
You can schedule a start/stop time for content, but there's also ways to schedule their appearance local content indexes (views/queries) For example, an upcoming list of meetings. Once the meeting date ends, the meeting moves from upcoming meetings to past meetings. Once presentations are available and radio button checked, it appears in the list of meetings with presentations available.

More than a handful of themes?
There's a few dozen at the moment. There's a handful of Mura-specific styles needed, but beyond that, you can style away. I'm using bootstrap as a base and going from there.
http://docs.getmura.com/developer-guides/front-end-development/convertin...

Taxonomy?
Yes, there's categories and tags available. You can pre-sort local content indexes by categories, create nav items, set featured content within categories (and schedule start/stop dates within categories). You can nest them. Fairly easy to dynamically create/check for them as well.

Customizable views/queries?
Local content indexes is probably the closest thing within Mura. You can select areas of content, and you can use advanced params to sort content by all of the base meta data (~30 fields like creation date, updated date, release date, URL title, page title, summary, credits, start/stop time, class extension type, etc.). Nice thing is any class extensions are automatically included as fields you can sort on. Basic selectors include equal, not equal, less than, greater than (and equal to), begins with, contains, in, not in. And then there's a field for what you are actually selecting on. Can also use standard CF functions in this field. For example, dateAdd('d',2,now()) can be used on a date field.

Custom menu construction?
Yes. Depending on how you want it created, you can you a local content index for navigation, or write a completely custom one, stick it in a component (reusable and inheritable content) and display where it is needed.

As far as sites that run Mura. Some of the big ones are:
http://www.croix-rouge.be/actualites/
https://canpweb.org/