I used Ada on my first coding job - test scripts for Airbus engines back in the mid-90s. Nice to see they're still using Ada, though tbh I don't remember a single thing about the language except for you can't dynamically create objects
Ada used to be basis for CS Curriculm at Cal Poly Pomona (Circa '92- '98). Ada teaches good practice. One prominent feature is that there is no implicit casting; Add a float and int, you get a compile error. It's good to know that you have to do exactly what you want and the compiler enforces this.
I remember seeing PL/SQL circa Oracle 8i and it looking a lot like ADA.