Rather than maintain two separate travel sample apps,
or just a new async version that will be harder to quickly understand,
we will add a section or subpage to https://docs.couchbase.com/java-sdk/current/howtos/concurrent-async-apis.html
covering how to rewrite some parts of travel sample app for async (and/or reactor),
giving an opportunity to illustrate best practices, and why.

If the above is the approach taken, then at least add a note in the sample application README pointing to the how-to sections in the documentation. Clients that have been with us for a while often are just browsing the public couchbaselabs repos looking for example projects to learn how to use the API, so we need to point them back to the how-to write up.