Nova let me turn off animations and effects I didn't care to see and because it allowed me to back up and restore my home screen layout, it made the process of switching to a new device completely painless, even across different Android versions and OEMs. My Android experience has been identical for the last dozen years even as I used LG, Pixel and Samsung phones and a half-dozen different tablets from cheapies to premium models.
Microsoft Launcher probably isn't going anywhere, but I'm still pissed at Microsoft for killing Swype + Dragon, the best keyboard experience Android had. Gboard is barely acceptable, but since it requires me to manually import a user dictionary I have to maintain as a plaintext file, it's never going to live up to just signing in and getting all the acronyms, jargon and proper nouns I use daily back. Lawnchair might be functionally fine for me as well and probably isn't actively fucking me with datamining, but I don't think it fully replicates all the things Microsoft's does.
All in all, this whole deal just sucks.