Guess it's a personal preference thing, plus people being busy and having limited time. For me it was more interesting and sticky when more people posted their music, either their personal recordings with backers or recordings of their performances or just noodling. I have all the gear I need and don't do my own mods, so that part of it doesn't move me much. It's more about musical interaction. The days when one person would start something on a backer and others would add their interpretation were good times. But granted, that requires some time and energy.

Good that you're asking these questions. Hopefully others will chime in.