ROCA strikes me as a very close description to an ideal Rails-based application. In fact, when Stefan was describing the pattern, I said "duh, that's a Rails app" or something like that. But what he's trying to do here is useful, introducing a description that is technology-agnostic.

The main deviation from ROCA in my own apps is that unless utterly simple to accomplish, I don't try to accommodate non-JS browsers. Not as a matter of principle but rather of convenience. It is nice to aspire to 100% functionality in non-JS contexts, even with degraded user experience. I just don't know that it's practical in most cases.