I was pleasantly surprised when Ada started working right after installing Revit 2018. It managed to work long enough to get most everything else installed. I wrote long enough because it attempted to apply FormIt updates for 2017 and 2018 yesterday and ended with failure to install messages.
No sign of Ada since and now I get a nice FormIt error when I launch Revit. I guess I'll just have to get along without it or Ada...until Revit 2019?