the main tradeoff is that you are trusting more complicated proofs to guarantee supply.

on a transparent ledger its easy to write a program to sum up the UTXO set and check that the circulating supply is what it should be.

this is not possible on Monero since nobody except the sender and receiver of a tx can see the amounts.

that said, the proofs that confirm Monero supply aren't particularly complicated or new.

it just depends on your personal willingness to accept one or the other as "reasonably safe."