I'm at my 3rd moto atm. A slightly outdated g31. It came with Android 11 and only recently 2 years after I bought it, it got the 12 upgrade. Still gets regular security patches.
Next the apps installe by Motorola (where I mean by optional that you can deactivate them, not uninstall). None of these apps are in the top 12 in the battery usage statistics and most of them are activated.
A tutorial center with "kurzgesagt" like animations e.g. for gestures. A selection of shortcuts to settings for customizing your device and Motorola QOL settings.
Moto Actions and Gestures (20MB, optional)
Enables the gestures (has no other brand a shaking flashlight gesture or has Motorola patented it?).
Moto App Launcher (4MB)
The Motorola specific desktop customization. I don't know how close it is to the Pixel stock image but it doesn't get in my way.
Moto AI Services (whopping 200MB, optional)
The reviews for this service are scalding. I'm honestly not the biggest fan of having AI on my phone that's not in my control. Two reviewers point out, that it probably isn't very invasive AI and rather used for QOL features, like the shaking flashlight feature.
Moto Feedback (31MB, optional)
Helps the user sending feedback (bug-reports and memory-dumps?) to Motorola. Again smotheringly bad reviews. Never had to do with it or used it knowingly. Can be deactivated.
Motorola notifications (88MB, optional)
Again some furious reviews. Double edged sword as it's used to send news about updates but also push ADs. But the latter isn't very spammy. Just every few weeks or month a push notifications about a new moto. That's about the only place where I would see ADs (apart from regular apps).
I had ONE hick-up with Nvidia drivers on arch in about 6 years. I needed to downgrade them initially when Valve released the new Steam UI. That's been fixed pretty fast. When I'm thinking back it was the only problem I had with arch upgrades in its entirety apart from one that was completely on me: installing KWinFT which completely messed up some system libraries (but was repairable). Arch was nothing but rock solid stable for me.