That's a fair concern and something we're working on improving every day! It's fairly common when you consider Retool in the context of other development platforms. VSCode is a 200MB download and is considered small in the desktop space. Even gdocs is ~30MB.
For context, these resources are cached on your machine. So you should find that the actual data transferred significantly decreases after the first visit.
For context, these resources are cached on your machine. So you should find that the actual data transferred significantly decreases after the first visit.