I’m a huge believer in .app. If you’re starting a project and using a .io or similar I’d switch ASAP. If you have a bad .com, I’d switch. If you have a good .com then ummm keep it
The internet has needed new real estate for a while. All these random extensions suck though, the internet needs a new semi-default TLD where the average person knows to look and understands what it means. .app is the first one to have a shot. There’s not a person on earth who doesn’t have some idea what an app is. If you’re building a mobile or SaaS app owning your .app domain is a must.
Is a great domain as important as it was in 2002. Nope. We’re all beholden to Google now. Nevertheless a good memorable name/domain IS important and .app is the first chance in years to grab a good solid domain normal people will get and without paying a huge premium.