I'm quite familiar with asciinema[2] as well, which I've considered using for creating animated examples. In general, I like to err on the side of caution, and optimize my website for people with poor/metered connections.
Also, I didn't expect this to get this much attention! Mea culpa for not putting more work into the post itself.
1 = https://sw.kovidgoyal.net/kitty/index.html 2 = https://asciinema.org/
What I was trying to say is: how about extending your blog post with one line to show people how to make the boxplot appear in their terminal as soon as they run the command? (I think at the moment it's going to appear as a PDF file named Rplots.pdf in the current directory, right?)