As my equipment (phones and PC) ages I like to combine parts to maintain them and replace key components that age (drives and batteries). I am not afraid to disassemble my stuff but I take care of it over time and don't want to take a hit on fit and finish. I've seen macs that had been improperly disassembled and reassembled, and they just don't look right -- edges roughed up, rubber/plastic parts misfitting, seams not aligning properly. I would hesitate for this reason.

In short, yes, I would buy a laptop that had no user serviceable battery. I would not refuse to purchase a laptop because of something like this, but for my purposes it's a misfeature. It would compare unfavorably to another machine that had a removable battery, insofar as this specific feature is concerned, but perhaps not overall.