In general each setup seems to end up having a lifespan of about 5yrs. New things come up (e.g. I added an Unchained multisig to the mix) and some setups just start seeming pretty dated (my first multisig was nested segwit).
In the coming years... spin up some miniscript setups (Anchorwatch, Liana)? Play with FROST?
Maybe a bip360 PQ Taproot setup...
etc etc.
Overall I think people are just too precious about these things. You can't get a setup perfectly right and stay there for the next 40 years. I'm still learning and bitcoin tech keeps evolving, so... so do my setups.