A question that shows up constantly: I have an address from 2013, is it still good? Yes. Bitcoin addresses are not accounts with a bank behind them. An address is a public key expressed in a particular format, and the network's rule is simple: if the signature matches the key, the coins move. The year the address was printed doesn't enter the validation anywhere.
So coins sitting at a 1-address since the earliest days are still spendable, and a wallet that generated that address in 2011 can still sign a transaction today, provided you kept the keys. The famous lost-hard-drive stories are all about the keys, never about the address going stale.
What does change over the years is which format your wallet offers you. 1, then 3, then bc1q, then bc1p. Each step was a change in how coins are locked and spent, cheaper fees, smaller scripts. None of it broke the old ones. The chain is backwards compatible on purpose; Satoshi's software and today's nodes agree on the history because the rules never got rewritten.
The one real failure mode is custody, not format. Hardware from 2013 dies, software stops supporting old import formats, companies that held your coins vanish. Keep the seed phrase itself on paper in two places and the format question stops mattering forever.
The address you generate today will still validate in 2040. Print it, store the keys, and time is on your side.