I am loving Marimo, I think they are doing a good job of balancing ease of use with the ability to drop into a virtualenv and run the code. The UI is much nicer than colab, from a visual and feature perspective. Key for me though is repeatability and ability to collaborate at the branch level, shared notebooks have issues we all know about.

What’s missing for me is a local desktop app like Jupyter Studio, but that’s an easy thing for the community to build.