This definitely seems like a YMMV sort of deal. I’ve been using High Sierra and iOS 11 across several devices and haven’t encountered any issues that are more s

This definitely seems like a YMMV sort of deal. I’ve been using High Sierra and iOS 11 across several devices and haven’t encountered any issues that are more serious than minor annoyances. 2015 15” MBP, Late 2016 15” MBP, self built Hackintosh tower, iPhone X, iPad Pro 9.7”, iPhone 7+. All are more or less smooth with very occasional hiccups. I also tend to avoid third party apps where possible, particularly the more ungainly ones. Maybe that has something to do with it?