Do you use mostly Android apps?
I heard that the native browser is still some ancient Firefox fork. There is surprisingly little information about native apps anywhere, it strongly feels like they are mostly focusing on Android app compatibility. SailfishOS also has more closed source than I'd like to. Most often it does not end well.
I preordered the new Jolla phone, but after looking around the app side of things for a while, I cancelled. I'm not switching from Android to "sort of Android" -phone. If (or rather when, as I think it will happen) Google kills F-Droid and other ways to get apps, I will take another look on what's available. Ubuntu Touch maybe, but I understand their browser is also quite old, and that's one thing that should be up to date, at least, in my opinion. Or maybe just a dumb phone, and a separate camera. For maps, maybe a "prices-begin-from" Wahoo for finding routes. Sure, this approach will cost more, take more space, but I'm not going to go into the walled garden of Google or Apple.
About Jolla and SailfishOS, I am no expert. I ended up cancelling knowing that if I change my mind I will have to pay a lot of extra. Anyway, for the moment I am happy with my decision.