You can save notebooks to simple text files. You can write simple textfiles in jupyter lab and have a split view where you can execute it. You can have a notebook, console and graph view with the same kernel on the same page as split windows.

You can make jupyter lab behave mostly like rstudio, but it can do a lot more, especially in terms of visualization and rich display of data objects.

I wanted to like it but it kept crashing when I tried it a year or two back, I may give it another shot. I do recall it was closest to what i wanted..

If you need a multi-language notebook that plays nicely with version control then RMarkdown in RStudio is worth checking out

I've used it. It does have the feel of RStudio IDE if that's what you're getting at.

jupytext --sync