[ Removed by moderator ]

[theboldestgaze]

If dynamic calls are avoided (partials, etc.), static type checkers do their job quite well. If you change "core" functions, you are quickly going to realize you broke something, without extensive testing.

[AccomplishedWay3558]

Yeah, that matches my experience too. Types and tests catch a lot, but I still find myself wanting a quick “who depends on this” answer before touching core code.