Instead of thinking about the address, think of the private key. If you have the private key, your currencies will be backwarded compatibility for a long time.
Some encryption methods performed by many wallets may not be compatible with other wallets, so try to use open source wallets that you can rebuild them again and extract the private key that will be accepted in all Bitcoin.

Bitcoin updates will not canceling all previous transactions, otherwise it will be new Hardfork coin.