To each their own. I am just a weekend camper. I know that my 20 foot TT is not Real Camping but, I got older and reached the point where sleeping in a tent on the ground is no longer comfortable. I don't need, or want a slide. The TT is for sleeping, a decent bathroom, a fridge, and a sink. On occasion I even use the stove and furnace. I don't want anything so fancy as to have a slide. I'm camping, that means being outside doing things. Not setting around inside the camper.
The reason I keep my 1993 TT around is for it's simplicity. It's getting kinda shot but, I can't find a newer one that fits my need so well. (In my price range)