> Odds that you can teach them the basics of SQL and Emacs? Pretty high.
Have you ever tried to teach a regular person how to use Excel? The above reads like satire if I'm honest. Even teaching someone how to use Emacs alone would be seriously pushing it.
That said, in context of work, it's even simpler. A few tasks, a program. You teach people by example. Type this here, type this there, do this, do that, you're done. Nothing hard.
Think of it this way: almost every company that uses computers has some custom assortment of SMB tools and SaaS websites specific to the job at hand. It's normal that people learn this, and they have zero problems with it. Hell, typical ecommerce management panels I see people working in have UX an order of magnitude worse than Emacs.