Resisted Glock as long as possible. Pure 1911, CZ fan.
Caved on the inexpensive Gen 2 G19 LE trade in. Yuck NY trigger spring from the 1911 perspective.
New springs, a meticulous polishing, and cleaning. Immediately bought another Gen 2 G19. Lather, rinse, repeat for the trigger.
Love the Glock G19's. Not 1911 or CZ quality but damned easy to operate and boring (but reassuring) reliability. The myth and rumors are true.
Try new springs and polishing friction points before a trigger replacement unless you just want to spend the money.
I think, from my experience, you'd have to severely damage or nearly destroy all the original OEM internal components before you'd have to consider an entire trigger replacement.
DISCLAIMER I don't shoot in competition or train relentlessly, shooting multi-thousands of rounds per year.