Stable update.
I love the idea and do think it's a good move to make it default, but it does produce some _slightly_ different results that should be considered (mostly within documentation). For example, this page in the manual shows how you can add an `alert` to the events sheet via scripts, but this won't work while in worker mode since the webworker doesn't have access to alert:
construct.net/en/make-games/manuals/construct-3/scripting/using-scripting/scripts-in-event-sheets
Fairly minor overall, but definitely something to note.
Note worker mode is documented in the scripting section of the manual under JavaScript in Construct. Also if you create a new project and choose to start with script, it leaves worker mode off, so you can still directly access DOM methods like alert.