I don't have the experience to speak personally, but my thoughts would be, it depends entirely on the individuals. I may or may not like a relationship of TPE. I wouldn't want to force a submissive to become involved in one if they weren't intereted, but if they liked the idea, I'd at least be willing to try. 24/7 seems to me (again, without any real experience, just some deduction and inference on my part) to be a difficult way to engage in a relationship...on the other hand, I'm not sure how many D/S couples keep their relationship completely in the bedroom either. I wouldn't be surprised that if the sub in 'strictly in the bedroom' relationship tended to defer to the dom's judgment outside the bedroom-but I wouldn't be shocked either way. Just my thoughts.
(Hi to anybody I haven't 'met' on the forums yet, I'm new)