Thanks for this comment. I have actually wondered about this before. I knew AIFF was not Apple proprietary, and also knew it was gaining support, [I think you can get a package to play them in Linux]. But I did not realize that it was more or less common now. That is good news. It also strenghens the idea that AIFF would be better for long term archiving than Apple Lossless. Say my kids find them in the future when they retire and want to see what the music of the 1980's sounded like. Even if obsolete, they'll probably have at least heard of MP3's, and be able to play the AIFF's and\or convert them to whatever is new then. But it is possible that Apple Lossless could be a codec they'll have no luck playing, converting, or even finding much about...
I now know AIFF will not only be my archive format of choice going forward, but also won't regret having used it in the past for those CD's that the original discs were lost!