I'd say beta 3 or 4 of iOS 15 was actually worse than 1 somehow so don't jump in just because beta 1 is smooth if you can't tolerate bugs or the downtime to downgrade as needed. That being said, it's incredibly smooth thus far (continuing the trend of them last few releases being very usable on day 1). The only very buggy feature thus far that I've seen is trying to use the phone as a webcam ("continuity camera"). It took me 15 minutes to get it working and then only did with the phone wired to the Mac (I believe it's supposed to work wirelessly and is indeed selectable when you have the phone near the Mac and in landscape position).
The absolute worst bug that occurs from time to time in the dev beta cycle is when spotlight stops working (search is completely broken), when that happens I have to consider downgrading. It seems to affect me on some releases when it doesn't affect users broadly.
One year (iOS 10?) when iMessage/Messages was completely revamped the app was nearly unusable those first few weeks. That was brutal. Thankfully on iOS 16 beta 1 all my apps (knock on wood) launch and work fine. Books was rough initially but I went back to use it yesterday and it was working fine.
The absolute worst bug that occurs from time to time in the dev beta cycle is when spotlight stops working (search is completely broken), when that happens I have to consider downgrading. It seems to affect me on some releases when it doesn't affect users broadly.
One year (iOS 10?) when iMessage/Messages was completely revamped the app was nearly unusable those first few weeks. That was brutal. Thankfully on iOS 16 beta 1 all my apps (knock on wood) launch and work fine. Books was rough initially but I went back to use it yesterday and it was working fine.
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