It is more than entertaining and has a deeper purpose, as it did with Hillary. You are right, it probably won't amount to much legally now. It should, but it won't. What it does do is make Trumps agenda untenable and his re-election nearly impossible.
Besides which, at this point I don't think I want Trump to be booted out. I would rather have an incompetent who is unlikely to be able to do anything at the helm than a true believer like Pence, who republicans would rally behind like Moses marching on the promise land.
Yes, I wonder if folks have considered what would happen if Trump does get booted.