Earlier quoted context omitted.
Really depends on what the business is doing. Chewing through TBs of data every hour? Probably not a good idea to use Ruby. Doing a bunch of really heavy math? Probably not a good idea to choose PHP. Doing a SaaS service? C++ probably isn't a good choice. There are some really good general purpose languages that can fit most circumstances (Java, .Net languages, Go). However, I'd be careful to say that you could apply…
I hate to be "that guy" but I see no reason not to use PHP for all three of those things. PHP is faster than Ruby. [1] PHP from a local script does math just fine. It's the round trip of the request to a PHP server and back that you're associating with poor language performance. In a local scripting environment PHP7 is considerably faster than Python3. [2] PHP is an extremely popular language as the backend for SaaS,…
I think to OC is not well formulated: If you're selling a web app or web SAAS, any language the founders know best is the best. Any other stuff, it is not always the case (but it might be!)