"He also talked about sealed computers and how that was a big change from the days when there were multiple slots."
I'm still a fan of multiple slots. I like being able to open up a desktop computer, install stuff in slots, upgrade memory, put in another hard drive, try a new video card, blow dust off the CPU. This puts me in a minority of everyday computer users, I realize. I don't know anyone else who still uses a desktop computer at home, more or less exclusively. Maybe one day I can open a booth at Craftsman's Valley in Dollywood. I'll be the guy upgrading RAM in a desktop PC, between the blacksmith and the glass blower.