esmi,
I understand the differences in the two organizations. What I don't understand, is the reasoning process on making a decision NOT TO FILTER Themes & Plugins by Responsive, Adaptive, or Mobile First design.
In other words, is there: an Act of God, Aggravation, Downside, Outside Developer Resentment, Political Reason, Repercussion, Technical Difficulty, or simply a Lack of Direction on deciding NOT TO FILTER ?
You would think that at least one (1) of the above "folks" has seen the "Responsive Layout" filter on WordPress.com and thought: "Hey, that's a good idea. Why don't we do that?"
But instead, he/she must have thought: "Hey, that's a bad idea. We won't do that".
What I would like to know is: What's bad about it ? What problems would it cause WordPress.org ?