A browser based IDE can't compare with a full IDE like e.g the IntelliJ-based IDEs from JetBrains, in terms of features. At best you'd get browser based access to a rich IDE running remotely... which is kind of the whole point of Fleet, but without (a) needing to run in a browser or (b) being tied to a specific website/service.
I'm not sure if you're trying to suggest "convenience" or "security" are points in favour of running something remotely or not?
Personally, the vast majority of projects I work on, use a Vagrant box in some way, so I get reproducible, "sandbox" environments without the need for internet access to make it work.
My work is a bit of a mixed bag, including (but not necessarily limited to) the following (in no particular order):
- PHP library development;
- PHP web app development;
- Shell library development;
- Infrastructure tooling development;
- Dev tooling development;
- Vagrant box development (i.e. creating base boxes to use in projects)
