You'd be crazy to suggest that GIMP is a more convenient option than Photoshop. You would not be crazy to suggest the same of Audacity.
MuseScore is a particularly interesting case. I'd have said that it's more on the GIMP side of things previously, where you'd only use it if you couldn't afford Sibelius or Dorico because it's a seriously inferior product (an ironically painful thing to say, because even they are extremely flawed in their own ways). But then in response to a pretty scathing and humorous review, they hired the person responsible for that critique to head up a redesign, and today MuseScore is excellent.