Comment by mathisonian

We're working on this with https://idyll-lang.org/, it does some of the things you mention already (standard conventions for how to do common tasks, standard set of widgets, handles loading data, extensible plugin system, etc).

But it is a big undertaking and there is still a lot of work to do. If anyone on HN wants to contribute or give feedback you can reach me at mconlen at cs dot washington dot edu.