I would say that we have more monolingual programmers now - programmers, including "senior" programmers, who only know one language, whatever it happens to be. This distresses me.
I'll disagree. To develop for web sites you may need to know a whole stack of languages, C#, HTML, JS, CSS, TSQL, PS. And that's just the Microsoft stack. Some of my peers have used over 20 different languages in the last 5 years, not to mention 15 or more different database system.