Nice code, this reflection is really powerfull 
In my case (activity creator projects) UiPath.Robot.Activities.Api working stable in many environments and UiPath version (from 20.4-22.4). We tested also log messages, wizards, analyzer rules and custom settings. But I think we should remember to test our solutions every half year on the newest version of UiPath and upgrade UiPath.Robot.Activities.Api version if necessary.
Now I am wondering if I should keep the UiPath.Robot.Activities.Api as dependency or use reflection methods…