Late to the party but this whole thread is 💯. Glad I found it.
Coming back to this... basically, having analyzed the structural failures on these larger devices for years, the issue is almost always material fatig...
For your situation, I've spent years basically testing every type of screen protection for these Samsung flagships since the S10 days... tbh the ultra...
I went through this last year... honestly, I was super paranoid about my phone falling off during a hike. I tried MagSafe but didn't trust it for "act...