With the Seraphis upgrade coming down the road Monero sender privacy will be just as good as Zcash using full membership proofs without all of Zcash downsides.
Ring signatures have never lead to anyone being discovered or busted in practice. They have been robust enough. 1 in 16 chance of guessing sender correctly. And with every hop it is 1 in 16^x chance (x being number of additional transactions).
Chance of correctly guessing sender after 3 hops:
6% -> 0.4% -> 0.02%
The amounts and recievers are still completely hidden.