Dr. Drib (et. al.), if you're writing screenplays and want to move seamlessly around between devices, take a look at WriterDuet:
https://writerduet.com/
It's got a nice corkboard, like Scrivener, and the pro version also works offline (the online version is free).
You can use it for fiction as well, with a little tweaking, although it doesn't have the export functionality available in Scrivener. (As a Chromebook user, though - with no direct access to Scrivener - this is a reasonable alternative at least for laying out and writing a longer work.)
EDIT: Sorry, just realised you were quoting Michael Smith above with regard to screenplays.
Graham