As a policy future plans are almost never announced in advance.
(Search the forum on “forward looking statement” and you’ll find numerous SketchUp employees stating this policy.)
I doubt anything has changed regarding policy since …
Developers category
- SketchUp for Web API(s) - what, when, how? (June 2016)
SketchUp for Web category
- Ruby Plugins and my.sketchup.com (July 2016)
- [Feature Request] Any plugin ability (July 2016)
- Can we get my.sketchup.com to support extensions? (Oct 2016)
- SketchUp Free Extensions (Dec 2017)
- Install extensions in sketchup free? (Nov 2017)
… which was said …
… and …