[FpUser]

>"Your use-case of running a web service that is written in a very efficient language like C++ is not something you see too much these days"

In some place including big ones it is very much being used.

>"our industry isn't doing things that way for a reason"

I think the real reason is - the slower your stack the more money you will pay to Amazon, Azure, Google or whoever else. And by way of advertising, trickling down to education and lots of other means they make sure that this is what everybody (well most) uses.

>"using low-level languages."

Since when modern C++ is "low level". It is rather "any level". I compared my C++ server code with the similar ones written in JS, Python, PHP etc and frankly if you skip standard libraries C++ code can end up being actually smaller.