I have been using Bazel (4, then 5) as the build tool for a small Go monorepo with ~10 (and growing) Dockerized applications importing a handful of internal packages. The initial setup was a bit of a learning curve, and it is overkill for our current stack, but builds are very fast.

At the same time, I have been using NX for a larger (though not huge) Javascript monorepo. Javascript is my strongest language, so take this with a grain of salt, but at my org's scale I vastly prefer the NX experience over Bazel. I think the reason is that NX feels like an optimized, natural extension of normal Javascript build tooling, while Bazel requires an entirely separate set of knowledge.