jamovi

I believe I did mention it to Vincent quite some time ago, around the same time I suggested it to JASP. As I recall, Vincent did show me a quick beta version.

There are some very light gray words in the background! On my phone's screen they're almost unreadable. On my laptop, I can read them with effort, but they do look like they're there by mistake.

Yes it's fixed (kind-of)!

Some OS names/labels are missing from the downloads page: https://www.jamovi.org/download.html

FYI. This is an easy plot to make in Plot Builder. I used to use R script for this, but Plot Builder is much less tedious (even though R script would ultimately be more flexible).

Maybe set up the cloud version so that it runs Rj+ client side in a browser, via webR, rather than on a server?

How about "Special Import"?