Has anyone here participated in such a short-term exhange? Was it worth your time?
However, it's always been very useful. Normally you hear of 'buzzwords' - kotlin, reactive, functional, dependency injection, architectures, all these things, but tutorials give you little to nothing. But once they're used in a project, the value (and downsides) are immediately clear.
It's also useful to learn some things, like how the caching works, why this thing is a bottleneck. Or some habits, like one person has their set of tools and configs which turned out to be really powerful.
We have a rotation program that involves three 6 months rotations for select new hires. The company claims that gives those people exposure to a broader understanding of technology and business use cases. I think that's true. I think it also builds their professional network in the company. This seems to work ok.