Why Jupyter? Do you mean iPython? Jupyter isn't a REPL. I find doing actual development in Jupyter to be impossible. It's OK to write the top-level orchestration script, but for writing functions (which is what using a REPL is all about) it's just horrible.
I think you're confusing the old and new naming scheme. The old iPython project split back in 2015 into Jupyter and iPython. Jupyter is the name of the language agnostic part of project that develops the notebook, web apps, repl and messaging protocol parts. iPython is the kernel that provides python support for Jupyter. However since python is by far the most popular language used by Jupyter, people generally just say Jupyter when just say Jupyter/iPython.
I was pretty sure all the 'GUI' components ended up under the Jupyter umbrella, not just the web notebook. I'll admit I could be wrong.
That being said, why do you find iPython so much better than Jupyter? I write probably 80% of my python code in Jupyter and cannot imagine coding without it.
One reason is that I can use iPython with a decent text editor like emacs. I've tried to make Jupyter work, but it seems like you're supposed to use the web based editor, which is horrible.
But it's also just not a nice workflow. Projects are not linear. I tend to work on a function and get it working in the REPL. Then build up the program by combining together higher level functions. How am I suppose to test functions in Jupyter? Write the test then keep evaluating it and then delete it later?
Jupyter is not linear. You can edit and evaluate any cell at any time. If you don't want test interspersed with the code, you can keep tests at the bottom by adding cells in the middle.
Jupyter is mostly useful for diplay of preexisting work.
I use it to make very pretty PDFs for bosses who want executive summaries, and I've started investigating using it to give lab talks so we can hack on the data together if i have to.
I don't think it's a particularly useful development tool.
