The problem with in browser anything is that editing text in the browser sucks. It steals a lot of key bindings you can never get back, it allows for selection

The problem with in browser anything is that editing text in the browser sucks. It steals a lot of key bindings you can never get back, it allows for selection of the wrong element. Also notebooks are a horrible way of working. They encourage code to get extremely unwieldy and make managing state harder than it needs to be.