A Wikipedia page is pretty good at showing the precise date when a version of macOS was released.
The corresponding wikipedia page for MacPorts is not quite so helpful, and the MacPorts.org download page does not list any release dates.
How long has it typically taken historically (or for just El Capitan and Sierra) for MacPorts to catch up with the newest macOS.
I got cornered with High Sierra and am trying to determine whether to keep H.S. and use another Mac while waiting, or to wipe it and downgrade to El Capitan or Sierra (and keep my fingers crossed that merely installing High Sierra has not already done irreversible changes to the Time Machine disk I used during install).