While it kept growing in popularity later, by 1983-5 C was already one of the top programming langugages in the world.
> C++ came out in 1985 and didn't become the dominant language for gamedev until the late 90s
Major parts of Windows and Office were being written in C++ in the early-mid 90s, before C++ turned 10. Visual C++, one of Microsoft's flagship development products, came out in 1993. Huge mission-critical, long-term, industrial and defence projects were being written in C++ during or before 1995 (I was working on such a project).
> Python came out in 1991 and labored as an obscure Perl alternative until the mid-late 2000s
Even in 2002 Python was widespread as a scripting language. But it is, indeed, the best and possibly only example of a late bloomer language.
> Javascript came out in 1995 and was treated as a joke and/or afterthought in the broader programming discourse until Node.js came out in 2009
AJAX (popularised by Gmail) pretty much revolutionised the web in 2004. When jQuery came out in 2006, JS was all over the place.