It's a great question. When degoogling my android phone camera quality was one of the biggest initial hurdles, currently resolved because Fairphone offers their native camera app to /e/OS. FOSS camera apps for Android sadly do not have competitive picture quality at all.

As pictures are important to me I could absolutely see it being one of the main hurdles when making the change from /e/ to proper Linux on my phone. I should probably find a way to preemptively start donating to the GNOME camera app.