A few StarkEx DEXs are already in production on the Ethereum mainnet, and they have 1.1 billion TVL and 390 billion dollars worth of cumulative trading volume.
Being able to understand Cairo and Starknet right now is like knowing the value of oil before cars existed.
FRENS, you don't need to learn a new language to build on StarkNet. Things have changed very fast. with the WARP tool from Nethermind, you can translate your Solidity code to Cairo. The results are very very good.
In general, the common consensus is that STARKs have a technological advantage over SNARKs.
STARKs are also known to be post-quantum resistant because it makes a leaner mathematical assumption of collision-resistant hash functions as compared to SNARKs