iOS dev here, especially when using Swift, supporting older OS’s greatly restricts which new Swift features you can use. Especially any OS lower than iOS 15.
Give the fact that the vast, and I mean like 95% or more, of iOS users update to the latest iOS version within months of release and over 99% of users are on at least the previous iOS version, it’s preferable to start a new app on the latest iOS version possible.
Unfortunately that means older (usually 5+ years) devices get left out, but with small volunteer dev teams or solo devs it makes practical sense.
That’s a really great idea, I never thought of that! Would have really helped my 2 hour each way commutes that drove me crazy before I went full remote.