Just downloaded and installed Delphi 11.1, and all the unit tests passed without a glitch. So I can announce that DWScript is compatible with Delphi 11.1 for Win32 and Win64! You can find links to all the Delphi 11.1 release details on Marco’s blog [1].
In other news, the tip of the DWScript repository [2] is considered stable, but a round of core changes were made a few days ago. The last stable state just before the round of changes can be found in the DWScript Releases [3] on the GitHub mirror. The next round of changes likely be able to will rip out the stack from the engine, and transition to closures.