True, but it's not hard to roll an entire self-contained bundle for which you can find a host.
Back in the 1990s, LAMP was the most widely available stack and finding reliable alternatives for which you had enough information to make an informed decision was hard. However, we are now far beyond that monoculture and there is enough information asymmetry that you don't need to choose a stack based soley on what is common and available. There is enough variety out there and the tools for deploying without having to rely on your hosting company's stack are good enough that we can have something besides LAMP become popular enough for hosting businesses and OS creators decide to include the the necessary dependencies as default.