While setting the text alignments on some paragraphs, I happened to notice that under the text options, it's possible to expand the alignment option so one can set different alignments at the various breakpoints above XS. The option to set text to "justify" at any size above XS should not exist in the drop-down menus, since there are no such Bootstrap classes (example: text-lg-justify does not exist in Bootstrap.)
I was actually surprised when I went to the Bootstrap site and confirmed this. I don't know why they chose to not offer the option to justify text at sizes other than XS, because I can certainly imagine scenarios where one might want text to be centered on mobile, but justified on desktop. Of course, it can still be done by creating a custom class and using a media query. Just kinda odd that Bootstrap omitted this.