There's one group of Android users Google's new sideloading rules won't affect
(www.androidauthority.com)
It's easy enough to work around most of it, with web apps. You can even install them to have separate icons. Granted, there are some things that are impossible, like digital ID, but there aren't any that fundamentally affect phone usability, for my personal use.
What's holding me up is work stuff. I get a stipend to have a work phone, so I just use my personal device, but I'm getting a separate device for work soon so I can cut out everything Google/Microsoft on me personal device. Digital control and privacy matters.