Why am I being asked to explain something you posted, that is irrelevant to the discussion?
The reason you are confused is probably because you skim read the original post, decided the discussion was about settings, & are now talking about a version of the thread that you have constructed in your head.
The issue I am having is that the tablet-optimised taskbar is gone. Not that a setting is missing. Not that something has changed to 'off' by default & needs to be turned back on (never mind that the post you've quoted only mentions it being off by default when an organisation is handling things). The feature used to work as it did in the quoted paragraph beginning 'New!', collapsing while running programs, & expanding the rest of the time, a little taller than its normal state when a keyboard is attached, & with more widely-spaced icons. Now it does not do this. It really is that simple.
Your readiness to help is an admirable quality, but it's a good idea to know what you're helping with before throwing yourself in
Not something I posted, something MS posted.
I have a tablet and I don't see the settings they are talking about, nor the optimized taskbar, with any build. π€£π€·ββοΈ
One thing you are missing, is that when you are using an insider build the organization in that case is MSFT, and they control what is enabled and what is not. π€