Leave it to (whoever was behind) Weekend Warrior to create the category of RV's now known as Toy Haulers; they were the first.
I remember an old saying that went something like this:
-Did you think of it first? No? Oh well. Yes? Great!
-But did you actually do anything with that idea? No? Oh well. Yes? Great!
Lots of great ideas out there that just languish until someone takes the additional steps to bring it to fruition. It just takes courage and funding.
Edit: Now I see (in another post here) that it was Mark Warmoth who created WW. Sadly, he passed away in October of 2020. RIP, Mark; there are thousands who camp in a way that YOU created for them.