I guess there aren't many older games because it's a list of games that are available on current hardware. Those older games that do appear are there because they've been ported/emulated.
I don't really agree with the selection or the ranking, but I do really appreciate the attempt of going for "what's best to play right now" instead of ranking by historical significance or some kind of futile "objective" quantification.
It works better as a sort of "100 good games to play in no particular order, with individual descriptions of why" than any sort of ranked list to compare with other ranked lists, though.
Nice to see half life alyx here and other games with VR modes. I would definitely add lone echo 1 and 2 here as well. Probably the best games I've ever played and not just VR.