Drupal 8.x

This is driving me mad!
I developed a few sites in Drupal 7 and installed the superfish menus and libraries. I then enabled the superfish menu and set my main navigation in one of the superfish blocks. I then set the menu type to Vertical and everything worked perfectly. I got a fine horizontal menu.

hi there,

I am thinking of a review website targeting local places, actually just not thinking, but made my mind to do this. Putting up things together..

I have always used wordpress by far, but, thinking about trying Drupal too. Below is a structure of the site that I have conceived.

some domain name .com/alabama
some domain name .com/alaska
..../arizona
..../arkansas

and do so on.. until
.../Wisconsin

and then 51st sub-site like below
..../usa

I can't find any information on what Drupal 8 sub-theme inherits from it's base theme.
For example this page nicely explains what is inherited by Drupal 7 sub-theme:
https://www.drupal.org/node/225125
but there is nothing about inheritance on this page that talks about creating a Drupal 8 sub-theme:
https://www.drupal.org/node/2165673

I've never run into this before and have done all the troubleshooting I know to do...

When I type out text by hand into the body of an article it shows up correctly in preview and all views.

If I copy text from some other source like a word doc, HTML doc, even a .txt file; everything after the first line break is not showing up. I've tried reformatting the text, moving it to different programs, changing the "text format", editing it in source view and no matter what I do it won't show up in either preview or saved/published.

I've got a Drupal 7 module for incorporating links to related content within another node, based on matching taxonomy terms attached to the other node. I originally implemented it with hook_form_alter and hook_node_submit. Since the latter has been removed from D8, I'm doing what I should have done originally and adding the related content tag sets in as a field. So far, so good. The basics are working fine.

I have a module "flot_d8" which is a wrapper for a javascript library. I would like to streamline the way this library is called from other modules (flot_examples in this case). I currently call it like this from src/Controller/FlotExample.php