My takeaway from this article is that I want to go try Fira Code now.
The main reason is I find the Unicode support much better. With Fira Code, some Unicode characters have varying widths even though it's supposed to be monospaced, making it sometimes look like a proportional font. JuliaMono doesn't seem to have this issue.
Example with Fira Code: https://i.imgur.com/YqlzgTE.png
Example with JuliaMono: https://i.imgur.com/41aHGVM.png
https://www.programmingfonts.org has a nice list, but besides JuliaMono only one other font on the list retains proper monospacing for less frequently used Unicode characters. You can test this by pasting the example below:
⋈ : naturaljoin
⋉ : leftsemijoin
⋊ : rightsemijoin
⟕ : rightouterjoin
⟖ : leftouterjoin
⟗ : fullouterjoin