Not really: I have a non-HD wallet (my very first Bitcoin Core wallet created days after I joined Bitcointalk), and it has a keypool that stores 1000 unused keys. Each time it's unlocked, it refills the pool to 1000 again. So any backup is good for a very long time.

When I asked I was expecting to see people storing bitcoin in this way, but I thought most people have migrated to descriptor wallets so far.[/quote]
I don't like how complicated those are for a simple import/export.