There are many reasons why someone may not want to update and lose 2014GameDev.

There were certain subtle differences between 2014 and P11 Firefly due to the shoehorning required to make most parts of the material room usable with both Firefly and Superfly.

It does all you need it to do and you don't need Superfly.

PoserFusion is apparently being discontinued going forward. It maybe that's your pipeline.

They may only have a 32bit pc, P11.2 requires a 64bit pc, that's quite a biggie.

Even WardrobeWizard. I believe it's no longer in P11.2. I personally prefer it to the fitting room.

So it's not necessarily as clear cut to update/upgrade as you may think it is.