If you have multiple keys on different locations that you all fully trust, there's no need to have multiple keys at all. You could just use a single key and back it up at multiple locations.

budmo

bitcoin

Musig playground: send btc with many people while looking like just one person

super_testnet

Anything Taproot related is super cool, great work! Hopefully some day we'll see people switch to more efficient Taproot outputs for script/multisig addresses. 

Speaking of which, and this is maybe a more appropriate question for Bitcoin Stack Exchange, but do I need MuSig2/MuSig/MuSig-DN if I'm all of the parties in a multiparty address? I know simply adding schnorr keys together is insecure (rogue key attacks), but imagine I want to setup a multisig address where my keys are in different locations. Could I avoid using MuSig in this case (thus skipping the extra rounds of communication), since I trust myself?