I suppose time will tell if they actually hit that date, but Mark Benson, Head of SmartThings US, mentioned it on the latest IoT Podcast with Stacey Higginbotham around the 40:00 mark.
As you alluded to, we’ve already made our next-generation SharpTools.io integration with SmartThings live for new users (which takes us off Groovy). You can find some details on the SmartThings Groovy Update post.
If there’s a relevant device in SmartThings, yes, you can leverage those devices in SharpTools.io rules.
Or if you have some bespoke profiles that are unique to Tasker, you can also have Tasker trigger SharpTools rules using Rule HTTP Triggers. This is a pretty powerful feature as you can continue to use your Tasker profiles and update them to call to a Rule HTTP Trigger (and even pass in parameters). From there, you can either store things in SharpTools Variables or connect those rules up to Virtual Devices.
I can sympathize with that! And it’s part of the reason I wanted to get the message out and pull the app listing. I know it’s not a ton of time, but it’s the first public mention by SmartThings officials and I wanted people to be able to get ahead of this before Groovy dies!