I think this may appeal mega owners who can do a straight swap of the shock, but will need to track down 29 wheels/fork.
On the other hand, for TP and smash owners, they technically might not need anything new, just a new airspring for a longer fork, and a restroke of the shock to get full travel. That shock service is probably in the $150-200 range at a local shop with some experience doing full damper service. When I restoked mine, I just used it as an excuse to do a damper service. I was just going from 65 to 62.5mm (dpx2 uses 2.5 mm spacers, not sure about others) and after having some convos with Fox service and GG the conclusion was a revalve was not necessary. Valving might not be perfect, but will probably be fine. who knows? I agree that the real world differences between a 230x60 in this bike and a stock smash will be small-ish, and possibly not worth it. For obvious reasons, not my place to knock someone for tinkering with random crap to limited benefit.