If you are looking outside of time based lock as in a pool that is imposible because even btc assiciated to wallet has conditions that can be considered as locked until a new type of transaction is executed. Even so I am not sure you can determine. With taproot is even harder because contract conditions can be really hard to determine. Also even a multisig wallet can consider btc locked.

I would be interested in this as well. It might depend on the technological level and so many other factors.. what might be maximum now might be hugely different in the next 10 years. Alao depends on the quality of life expected. If everyone has a castle with 15 acres is different than everyome living in 2 x2 m flats.

#nostr lots to discover