For me, it really comes down to comfortability. I have a hard time transitioning to other things because I'm so used to using photoshop over the last 10+ years, and with the variety of things that I use it for, I need something that is basically an AIO.Perhaps I shouldn't be, but I'm surprised that so many already mentioned Photoshop, I actually thought more people were moving away to other tooling especially when CC came around. I used to love working in it but sadly I haven't touched it since CS5/CS6 maybe?
Nowadays I use Figma mostly for web design and Affinity Photo if I need to do something more akin to what I used to do in Photoshop and it seems to work out ok