Doesn't sound like things where you'd want bugs either. But also the rewrites for this kind of thing are usually not that "serious". A few people do it because

Doesn't sound like things where you'd want bugs either. But also the rewrites for this kind of thing are usually not that "serious". A few people do it because they can or because they think it's interesting, but it's not like there are large pushes to replace such tools (E.g. there's been "lets rewrite basic tools in Go" projects too, and nobody is surprised that they aren't in widespread use"). The winners usually are not in that category, but tools that stand alone.