> Using vcpkg [...] When you configure your CMake build, your dependencies will be fetched and built appropriately for your targets, and then CMake's find package mechanism can be used just as it is used for external dependencies.

Yes! I believe this is powerful: if CMake is used properly, it does not have to know where the dependencies come from, it will just "find" them. So they could be installed on the system, or fetched by a package manager like vcpkg or conan, or just built and installed manually somewhere.

> Cross-compiling with C++ is hard.

Just wanted to mention the dockcross project here. I find it very useful (you just build in a docker container that has the toolchain setup for cross-compilation) and it "just works".