DRM reimplemented with extra steps, when even commercial emulated releases are DRM-free near 100% of the time. Did we get so far, only to lose it again? And if achievements are for bragging rights, the user could just take a screenshot and post to social medias.
Alas, I wonder if there are lists of emulatable games with in-game achievements too. And though those may be rarer before the PS2 if not going for romhacks, such mods for achievements may a potential niche to explore too.