Well, I'd love that but the landscape is much bigger than 264 or AAC - so the question is whether you support more stuff or not.
Ah, I see. It's a pragmatic complaint not a theoretical one. Well, in that regard I kind of like the current system, though obviously with Perian in jeopardy that makes things different.
Apple takes the high-road only supporting the future tech, kind of giving an incentive for people to move forward. That's fine so long as we get third-party tweaks that include support for the other codecs. But if those third-parties die out, then it's really annoying when things don't "just work", and that is a mark on Apple. So I'd be sympathetic with the complaint if FlipforMac, Adobe Flash-Player, Perian, etc. all stopped working.
People (I'm not saying you here) like to complaint that Apple's systems are closed, which is in part true, but they are flexible enough that if you do a little research, you can open them up to all the missing goodies. It's not clear to me why Apple should support everything under the sun. Find the best/most efficient way of doings things, and invest in that, let others pick up some change by adding additional support.
Same with Airplay Mirroring, give it for fully capable systems and let third-parties like Air-Parrot deliver the workable but less than ideal solutions. If Perian dies, some developer might be able to sell a all-in-one codec expansion for 5-10$. I'd probably buy that simply for the convenience, even though I wish everyone would just move on to x264 and HE-AAC.
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Why would apple support avi? Macs do not create avi's with any of their video editing software so really the only need are for torrents, now nothing against torrents I download tonnes but don't expect apple to help
We live in an interconnected world, if my friend makes a movie in windows and shares the file with me and it's an AVI file, then I'd like a way to play that back. Yes, VLC and other programs work just fine, but obviously the more integrated it is into your current system, the better. It's not that hard to add the support for these additional codecs. Again it comes back to the philosophy Apple is supposed to represent. "It just works". The consumer isn't supposed to have to fight the system to get what he wants his computer to accomplish.