_And_ sound, as evidenced by anybody who posts links to youtube or soundcloud, e.g., /a/ or /mu/. Having such functionality directly in 4chan uploads would further the goal of anonymous ephemerality/content creation better than links to other sites. I can see your point if by "4chan" you mean "moot and site admins" due to the copyright concerns, but my feeling from other anons is that audio support would be awesome overall.

>You haven't been on 4chan much, have you?

If the novelty truly never wore off, every gif would still turn into cheetus after the first frame, and every link to youtube would still be Rick Astley.

Plus, think of your argument if we already had audio webms for their legitimate uses and had never known restriction. Would you give up audio on all webms just because of an occasional "screamer"? Would you give up all images just because some anons occasionally post shock pictures?