[spion]

Using bazel is nontrivial amount of effort (most of the open-source rules don't really work in a standard way due to the fact that google doesn't work in a standard way).

I guess with a 1K engineering company you can afford a substantial build team.

[dastbe]

this is actually quite a lot better these days as the tooling adapts to integrate. go has always been the gold standard, but java/kotlin works very well and js/ts are much improved by rules_js.