I had a project that had to build for macos, linux and windows on armv7, armv8 and x64 (and there were some talks about mips too). Just setting up all the stuff required to compile for all these target archs was a nightmare.

We used a single huge docker image with all the dependencies we needed to cross compile to all architectures. The image was around 1GB, it did its job but it was super slow on CI to pull it.