Some games have enough room for new meta to develop even though there have been no updates.

That doesn't mean that's the only way to be a good game, and I don't necessarily have an issue with powercreep. If it's mild and expected, powercreep can also be a way to handicap... If you're introducing new people to a game, maybe you let them use current cards and you use 5 year old cards (or whatever), they get to practice with current cards, get to experience old cards, you get some nostalgia from your old decks, and you don't have to sandbag, because they've got an advantage.