i created my wallet in 2011 and i still use it today. it is still in Non-HD format. turning an older wallet into a HD wallet is a manual process.
So how do you manage your wallet, do you have a 2 laptop setup with a watch-only wallet? Also, what will you do once Core 30 deprecates your wallet? Im using Knots 28 so I don't know what they will do in this regard.
on core 27.1 here
i just have a bog standard wallet created in mid 2011 and i just did in place upgrades from there.
when the original HD format was introduced i elected to keep my old wallet instead of creating a new as i had mining payout addys in it and exchange whitelisted addys etc in it and, as im lazy af, i just kept the old format and made sure i always backed up wallet.dat to make sure any new keys generated would my in my backup set.
now with core supporting multiple wallets i can make a new HD format and use it BUT im pissed that legacy wallets wont be supported...
satoshi said never lose control of your private keys... so i guess ill run a final pre 30 version and run it in parallel on a dedicated machine.