According to Spring Boot's doc,

Spring Boot does not support h2c, the cleartext version of the HTTP/2 protocol. So you must configure SSL first.

So when running a Spring boot app, for example, in a Kubernetes cluster where TLS termination is not done by the Spring boot app, does this mean HTTP 1.1 should be used? Or is it not necessary/desired/bad practise to use h2c in such a context?