I would also wait forever for what seems like the simplest commands. You are using our computer way beyond its design specs. You have loaded more fonts, more files, and more stuff that the computer must sort through. You may not be deleting things you don't need you may not be de-fragmenting the disk. You are doing more things.
Newer software needs a bigger engine.
Where I live, near Bluebird lane, it's too far from the phone box to get any improvement. If you can upgrade your Video RAM, you're in good shape. More fonts mean slower system. More files in the extensions and preferences folders mean slower system. Don't just go yanking things, but try to move the unessential things out.