[VanHieu Vo]

Are you sure about that? InDesign, a program used specifically for handling typography, has very robust features for both underlines and strikethroughs. What does “bad” even mean? Typographically discouraged? What about use cases that aren’t strictly about typography or even aesthetics? Also, based on what authority? This, if anything, is more of an example of Adobe assuming nobody would use it or there isn’t that much of a demand, as with lots of other typographic features, so there’s really no point in implementing it (it’s probably not that easy to implement in the first place, especially with animated text).