Quote - Many Vendors of poser products are concerned {...}

 

To which you answered your own posed quandry, thus:

Quote - That is their personal issue to address.

Pretty cut and dried, TBH.

IMHO, they can do what folks do out here in the PC/Mac/Linux world... support what you can with the resources you have, maximizing your access to the market. For most folks, this means finding one platform and sticking to it. For others, this means supporting both. If you choose only one, then pay attention to requests from the customer base, and carefully look at what segment buys more of your stuff before making a decision. 

If you don't want to learn a given platform, then don't. Nobody is twisting anyone's arm here.

Quote - This entire recent micro Drama is the culmination of the business decision DAZ made many years ago when decided to create their own Free "Figure Posing and Rendering" application to ensure that their content business had a platform  other than poser whose future appeared uncertain back at that time.

Actually, it's the ongoing beating of a dead horse. :/