On Mon, Oct 5, 2015 at 5:23 PM, Adam Foltzer
Also I'm not sure if there would be less complaints if AMP/FTP/MFP/MRP/etc as part of a new Haskell Report would be switched on all at once in e.g. `base-5.0`, breaking almost *every* single package out there at once.
I doubt the number of complaints-per-change would be fewer, but I'm strongly in favor of moving away from what feels like a treadmill that doesn't value the time of developers and that doesn't account for the more-than-sum-of-parts cost of the "constant flux".
Broadly speaking, I'm a "fix it now rather than later" sort of person in Haskell because I've seen how long things can linger before finally getting fixed (even when everyone agrees on what the fix should be and agrees that it should be done). However, as I mentioned in the originating thread, I think that —at this point— when it comes to AMP/FTP/MFP/MRP/etc we should really aim for the haskell' committee to work out a comprehensive solution (as soon as possible), and then enact all the changes at once when switching to Haskell201X/base-5.0/whatevs. I understand the motivations for wanting things to be field-tested before making it into the report, but I don't think having a series of rapid incremental changes is the correct approach here. Because we're dealing with the Prelude and the core classes, the amount of breakage (and CPP used to paper over it) here is much higher than our usual treadmill of changes; so we should take that into account when planning how to roll the changes out. -- Live well, ~wren