there will be changes to UI.What's the issue with offering it for people who want it?
I don't get it.
You don't like it, don't touch.
This is bad thinking on the part of Apple and some superfans.
Steve Jobs was incredible, but he was not a god for all times.
If Apple want to make separate MBP with touch screen and it's own UI, fine.
I don't want iPadOS on my mac with touchscreen.
I am sure Apple won't maintain 2 different operating systems one for touch screen and other for keyboard & mouse.