I don't know. There's suddenly so many decomps that run native (granted this post is about WebAssembly). Is there no concern about hidden malware? IMO it doesn't have the same level of trust and vetting that the emulator scene has. At least not yet.
The emulator scene could have all the trust it wants and it was still ruined 99% of the time by people downloading ROMs from the first sketchy site that gave them a file download. At least here what is made quickly by an LLM can have its source reviewed even more quickly by an LLM for a decent assurance. Age always helps though.
How about, we just run all the games through the same emulator, instead of writing a custom half-assed emulator individually for each game? Then we could just audit that one point of failure and completely secure ALL roms, past present and future.