Regarding High Sierra I’ve been telling myself that maybe Apple is is secretly busy with The Great Rewrite to migrate from Objective-C to Swift. Or maybe they are rewriting stuff to get it on the path to the one, unified OS. I really hope this is the reason because otherwise it is really, really sad.
There is still a UI bug that I must file because seemingly no one but me deactivated LCD font smoothing and discovered that text is printed in bold if it contains non-ASCII characters. It’s infuriating that it is still not fixed as apparently no one has noticed since the release of High Sierra. I stopped reporting bugs because often it’s a duplicate and gets closed which is demotivating. But I can't know beforehand because their bug tracker is closed.