IMO, it's a matter of priorities. Daz continues to support what isn't even their own format, presumably because the feel it is of value to their customers. In defense of SM, Daz had the luxury of starting with a clean slate. SM has had to rip out old code.  AFAIK, rsr thumbs go back to the original PC version of Poser & were implemented to fake the functionality of the resource fork of Mac files, so it was probably very old code indeed and hooked into the guts of the program. Detailer import OTOH, like the other I/O stuff, again AFAIK, was implemented as a 'plugin', i.e. FFText.rsr (ironic isn't it).

I don't think it's a technical issue and I'll go out on a limb and suggest that given the code, they could implement it as a dll (ala P3DO) and restore access to it easily enough. So, I don't think it's a crazy thing to wish for though I doubt it would be done. It's just someone expressing a wish for something, happens all the time and no reason to dismiss that wish as wrong or invalid just because you don't agree with it.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken