Yeah I could see keeping the TT for the one time per year that the son and 2 granddaughters might go camping with me. Let them have the TT and me in the B.
I can see where a TC has some of the advantages of the B. But not all. I often wish the TT had larger windows so I can sit and look out at the scenery. With the right B, I could have a screen for the entire rear opening... open up the double doors, and voila, a huge window! I traveled with my parents in a 22' Winnie MH, back in the early '70s, so I can remember the convenience aspects.