Seen with 33.0.0 pre1 and pre2.
For example, in mod-copycat.. Using generateClients true does not generate clients.
Directory target/generated-sources/raml-jaxrs/org/folio/rest/client is empty.
Note that the problem is not new. The clientGenerator in 32 does not generate clients either.. Only when depending on an artifact that has classes already generated. For this reason client code must be a separate artifact from the (server) classes. For example as is done in mod-configuration with two sub projects. mod-configuration-server and mod-configuration-client.