I certainly understand being skeptical of the "nothing's going to change," which seems almost guaranteed to be wrong, but still, we don't need to lament the downfall before it actually happens, even if we think it's inevitable. If they change the amount of money going to artists, or cripple the feature set, or stop supporting a platform you like, or disable downloads... that's when we lament.

Edit: for one thing, anyone who pops up with a "bandcamp replacement" right now is going to have a very difficult time arguing that their replacement is actually better as long as bandcamp is still exactly the same thing they were emulating.