It is still around actually! I looked into it a month or two ago when I was having some similar thoughts as OP. I found it quite cool they’ll let you download a windows 9x compatible version too for people using the images on a retro machine.

I’ve done the DVDs I care about, and ensuring I’ve got FLACs of all my CDs is probably next.

I’m deciding if it’s actually worth doing my PS1 games given I’ve already got a (not entirely legitimate) full 1g1r library on my media server, my rarest game is probably silent hill and that’s definitely already in there.