I no longer hack SMW, but I still play the hacks. When I did hack, the only thing I couldn't do was addmusic, and I didn't find it very important either way.
On my youtube channels, I post TASes of games. On my main channel I post SMW hacks, while on my other channel I post legit games. I still have a few non-smw hacks on my main, but I just started my new channel so I might move them over.
Main channel: Bullethead2202 (For SMW hacks)
Second Channel: FamicomTAS (For legit games)