Improving platform: Rails 8 with Propshaft (replacing Sprockets), SolidQueue for job handling built-in, ViewComponents, Hotwire, ... such a smooth dev experience.
The thing that really impresses me is how it's become a "one person framework"[1] and thanks also to the "batteries included" approach, you can run everything with zero external service dependencies. I have no problem with managing other services like a cache or DB, but it's just so damn nice to be able to focus on the code and not have to context switch!
[1]=Tons of posts and presentations I'm discovering now referring to that. EG https://mileswoodroffe.com/articles/rails-the-one-person-fra...