Thought I'd point out a detail that may be affecting the widely varied responses to Frank's decision ...
It's a good idea (to me) to offer different products with different target buyers. And anything that gets more guys building models with increased accuracy/level of detailing/etc. is also a good idea. Here's a piece of evidence supporting that ... even one of the most skilled builders we all know (Richard H.) had a large quantity of UNbuilt resin models in his "hobby shop in the closet". Perhaps even because they are resin kits - our resin models seem to be easy to "buy more than you will ever build". Who amongst us can say he doesn't have a supply of resin kits that he couldn't finish in a year if he did nothing else but work on those kits and focused on just that as his 'only' modeling activity?
So if a resin mfgr was to offer some long missing car - such as the flat car recently mentioned - but to do it -only- in the cast on grabs version ... then those of us wanting the same car but who don't want cast on grabs ===> are left wanting.
Perhaps the correct solution would be to offer the cast on grabs version only as an alternative to an already produced model in that resin mfgr's line? If the mfgr can 'rework' his line and issue the cast on grabs versions of even his products that are long out of production - there is the possibility that he can increase his business with much less time/effort. - Jim