ObservableHQ has the tightest feedback loops because of the reactive runtime. It's a better way to program visual things. I prefer non-sequentially executing programs. It's better.

Code changes are local operations, so your running program state is generally preserved . This is an amazing boost for iterative development. This is Smalltalk level productivity boosts

Sucks if you want to do something legacy but I want to move forward with programming and breaking the sequential execution model is the right step IMHO.