On GitHub, I can look for an issue which is a “feature request”, and then click Notifications -> Customize -> Closed. I will then get notified, when that issue / feature request has been implemented.
Because DeltaChat processes “feature request” via this forum, it’s impossible to only get notified when a feature has been implemented;
If you simply follow a post on this forum, you will get spammed with useless notifications for "every single ***** who posts a +1 / "me too" post…
It would be good to have another solution for this… 