I spent a night going down a rabbit hole with observable framework and it was terrific! It more or less just got out of the way and I was able to visualize and explore my google maps history in detail. Some of the data loader environment stuff wasn't especially clear but running in a poetry env did the trick for python.

I love kotlin and tried creating a data loader for a kotlin script but that had some rough edges. Kotlin expects script files to be named foo.main.kts but observable expects executable shebang loaders to have a foo.exe extension. So I created a proxy exe script to call the kotlin script, but it then doesn't trigger auto reloads of the data.

A bit of friction compared to marimo or jupyter is using variables between data loaders and the notebook. For example, I want to use the date picker view component to change the range of data fetched by my loader. It's not clear how to do that, so exploratory analysis is slowed down a little. I'm aware this goes against the paradigm but just wanted to point it out. It ends up with you potentially moving a lot of the data munging to the notebook as you explore, which isn't ideal from a performance perspective.

One last thing is I wish you could define dataloaders inline. I'm a big fan of single files, so being able to just add a python code block and let Framework extract that as a file would be a nice little QoL improvement.

Still the early days, but Framework seems promising! I'd love to have my all my markdown notes running through it to get a sort of org-mode type situation without going full emacs.