Correct me if I am wrong, but for loop macros remain "experimental" after 2.5 years in action and there is no explicit plan for upgrading that status. The feature needs to be activated with {.push experimental: "forLoopMacros".} or adding the --experimental compiler switch to a nim.cfg/command-line/etc. In my testing, late processed generic code using the experimental feature winds up requiring end client code to activate the experimental feature even though such end client code is not even calling a for loop macro directly and such client code is likely to be the "least expert" part of the code.
So, what do people think about upgrading them to non-experimental? Have people not been using them since they're marked experimental and might vanish? Are they hated? Loved? Have problems? No one cares? There are some instances in the nimble-verse (cligen, looper, nimpylib, nim-eth-p2p - but dropped in its follow-on nim-eth) & non-nimble things like vitanim and https://github.com/alehander42/comprehension.
Parenthetically, it seems to me that a dot call would be nice for For Loop Macros. Then you could say, for example:
for x in someClosureItrFactory(maybe, takes, args).toItr: discard
for x in toItr(someClosureItrFactory(maybe, takes, args)): discard