I meant it more as “this is the first general purpose language that is suitable for all projects”, you’re right it’s not the first language capable of that. If you are a masochist you could even write everything in assembly, but it does not mean it’s a good idea. C++ can be used for operating systems but I would argue it’s not a good language for that, there are reasons why it wasn’t added to the linux kernel (for example using exceptions requires special runtime support and adding support for standard library requires a lot of work)