I just upgraded to High Sierra, thinking that a couple of months was enough time for Apple to fix their bugs. I had upgraded on another <non critical> computer a couple of weeks ago and have had no problem. (OK, OK so I’m a fool)
I am currently in the process of trying to get my <critical> MacMini back to Sierra (OS 10.12)
These things I have noticed with regards to Indigo 7.1.1:
1. Airfoil Pro plugin no longer can change the source when asked to do so by Indigo. Oddly, on one case, where I used an applet that contains an AppleScript does work to change the source.
2. The WeatherSnoop plugin no longer can get data from my Davis Weather Station.
I sure hope all plugin writers are busy getting their plug-ins up to <High Sierra> date. In the mean-time, it would be helpful if someone maintained a list of what plugins still have problems with High Sierra, so we can make individual decisions about upgrading to macOS 10.13.