Thanks @zeebe. I checked out rapidweavercentral.info again, and although they do have a category to select ‘Responsive’ stacks, there’s no info that addresses where, or how to cross reference which of my stacks, from various developers, are not responsive, no longer sold (and why), are not supported, and are not compatible with Stacks 3 and RW6/7.
I’m hoping to avoid hours, and possibly days of cross referencing each individual stack, with each dev’s website, especially since my list is several hundred stacks long.
This topic is similar to: Mixing and matching Stacks from different developers, which shows the compatibility and usage of many different types of stacks is near the top of most user’s list of important info.
I hope this combination of stacks-usage, non-updated stacks and mix-match compatibility topics gets addressed in the near future, as stacks are so important to us all.