If you go back and review the release notes for older versions (and the current version), you will see that trimble has been quite active at supporting and improving sketchup and related programs.
Perhaps it doesn't seem like it because many of the new features and function have been in things like Layout and Style editor, things that many casual users don't use a lot. They have also made major improvements in the Ruby and C APIs that are used by the folks developing extensions.
I actually like that the basic interface and functionality has remained fairly stable. With very few exceptions, it does everything I need and I much prefer that they not clutter it up with a zillion little things that very few people ever would use, just so they can say they are improving it. There are many, many, useful extensions available for special tasks (like generating dovetails and rounding and chamfering edges, etc.) and I can load them and use them as needed, and get them out of the way when not needed.
I'm not a huge fan of the subscription model, but having been in the software development business for most of my career, I understand why most vendors are moving to it. I'm happy to pay a few hundred a year for sketchup pro; I easily get that much value from it.
--I had my patience tested. I'm negative--