Dear all,
A (very belated) thank you for the interesting conversation on this thread. I'm being very slow, but I'm still digesting the contents. I've tallied the answer on the questionnaire in this spreadsheet, that I've tried to make as helpful as possible (if only for my benefit, as I'm trying to make it speak)
The rest of the conversation, I have yet to figure out what to do, but the discussion on classifying the extensions by stability seems to intersect very much with the recent proposal that has been submitted by the Haskell Foundation's Stability Working Group don't hesitate to check it out
https://github.com/ghc-proposals/ghc-proposals/pull/601 .
One thing I will say is that among the respondents, there appears to be a pretty clear consensus that extensions should not be forever. I'll probably make my next round about this (if things go right, later today; but I'm loath to make any promise, considering how late I've been on the previous rounds).
/Arnaud