People (re)write such tools either for fun or to solve a problem (or best: both). Apparently after so much re-writes the problems haven't been solved. To me, this indicates fundamental problems. I'm not familiar enough with the ecosystem to know what those would be, let alone how to truly solve them.
But the very fact that we see new builders, transpilers, bundlers every few months is enough to conclude we aren't solving the problems on the correct level or that maybe it cannot be solved at all. Because otherwise one of the many attempts would've solved the problem and "everyone" would be using that.