> Is four months really an unreasonable timeline? I thought most of these packages released more frequently than CPython.

I can't really predict with any accuracy what the release cycle is for most scientific projects. Anywhere from 1 month to 9 months probably covers 90% of the actively maintained scientific projects. So is four months unreasonable? Not entirely unreasonable IMHO. Six months seems a safer estimate. What makes it difficult to predict is that many of the scientific projects do not have rigid release cycles and push out releases when a specific feature or bug fix warrants it.

Perhaps it would be helpful for someone to recap the current options on the table for moving forward and the most significant risk to Cython, Projects using Cython, or CPython by selecting each option.

Thanks.