I would play so much Vintage if only I could. I just don't have the money to spend to get into mtgo. Whenever I hear people complaining about having to wait 10 minutes for a game I kind of think "man, I wish I had these problems", it's not like you have to stare at the window for the whole time, just do some work or other leasury things while waiting. But I guess that is kind of an outsiders perspective. The metagame atually seems very interesting to me. Most currently powerful deck have a very solid core, that allows for brewing around.
If you stay with the PO core you can play it from hard combo over kind of midrangy all the way to very controlling.
Same goes for Xerox. The core of the deck allows you to go for a very controlling deck with only JTMS and a mentor as your win con, over playing more snaps, pyros and even going very aggressive with delver if you want to.
Dredge has a ton of very flexible cards that all get supported by the very powerful and tight core.
Oath allows for multiple strategies, however it seems like the core takes slightly more cards and most options you can take revolve around what oath targets to run.
These are just some of the top decks, and these are just the most popular options. If you run an established archetype defined by a incredibly powerful core, it often allows for a lot of different cards and ways to utilize it.
Maybe my lack of playing on mtgo kind of clouds my perspective, since a lot of people are complaining that the metagame seems stale to them as if they would always play against the same 4 75s over and over again. That is not my experience at all.
Edit: iam sorry for the rambling, it's kind of late and iam tired.