I made the mistake of downloading the P beta two days ago on my Pixel 2. It didn't make my phone unusable, but there is enough irritating things to make we wish I didn't:
1. I use Textra for texting. The app works okay, but if I try and delete a text, it crashes and closes. There is more than one way to delete a text in Textra and I've tried them all, no love. Not a big deal, but I like a clean text inbox.
2. I use the BlackBerry's Hub Suite for email and calendar. When I installed the P beta, it "broke" the connection of my accounts on both email and calendar initially; I had to go into settings and add the accounts back, not a big deal, but weird nevertheless. Calendar doesn't seem to have any issues so far, but the email Hub crashes every few minutes. Oddly, if I click on a link within an email that normally would open Chrome, the app crashes and the link doesn't open. Not sure what that is all about.
3. So far two apps give a pop-up message that there are "problems with the app native libraries" when opened. One app continues on to work, one doesn't:
FordPass app for my car - message comes up, but it works. Sent message to developer.
SwannLink app for home security cameras does not work. I sent a message to the developer and they said it must be because I have a cheap Android phone. I told him I had a Pixel 2 and he acted like he never heard of it.
So far these are the only problems. Some good stuff I've noticed:
I enabled the new gesture-based navigation and it was a flash back to the past when I used to use BlackBerry 10 devices. The gestures are nearly identical, but humorously worked a whole lot better and were more intuitive on the BlackBerry.
The battery life has improved markedly. It's only been a couple of days, but under my normal usage, the battery % just creeps downward lazily. I've been disconnected for over five hours and the battery is at 91%.
I'm hoping that a new update is released soon that may fix these issues. I don't relish having to reset my phone to return to Oreo.