Re tapping and other showboating styles, I was around Edinburgh during the Fringe for years and saw and chatted with a lot of street performers, and I feel that short-form, algorithm driven social media favours similar tactics to that. A lot of the performers who could dependably draw a crowd weren't necessarily doing something you'd watch a 3-hour show of or have as your all-time favourite album. The "wow, he's doing what with the instrument?" factor tended to be the big draw that got people walking by to stop. So lots of slappy-tappy-percussive looper performers, gimmicky or extravagantly faux-aged instruments, quirky arrangements of recognisable pop tunes, an unusual outfit or vibe, etc. Grabbing attention in the short term is everything, and I think TikTok and much of YouTube works the same way.