It's my first Pixel, I switched from a Samsung Note 20 Ultra 5G, and there have been some transition aches. I ran into the Android Auto issue this week where the phone would connect to my car for a few seconds then disconnect for a minute repeatedly, and I miss Smart Lock options like keeping my phone unlocked while on home Wi-Fi or while connected to a trusted device. Any Pixel vets know of a similar function on the device? (Edit: Found it! They changed the feature name to Extend Unlock and hid it in the privacy settings.)
Echoing another comment, the phone runs very cool and the camera is excellent. The battery lasts about as long as the Note 20 Ultra's under heavy use: if I'm running ReVanced or Twitch all day, it needs a charge around dinner time. I haven't yet adjusted to using the assistant (never touched Bixby on the old phone, either) so I can't speak to all the AI features added in.
Overall, felt some buyer's remorse early on, but I think I'll come to appreciate the Pixel 8 Pro as I get used to it and optimize it for my usage.