His dissertation is quite out of date with respect to current practical experience. Some of the ideas turned out to be great, others largely irrelevant. It was very useful at the time but don't forget it was realistically based on less than a handful of years of real industry experience. And most of that was in reaction to SOAP/SOA wars.
Before and during the time it was written there were existing HTTP based web services that were successful and they didn't follow all the principles outlined in the dissertation. Fast-forward 15 years and the vast majority of successful HTTP based web services still don't follow all the principles. Some turned out to be more useful than others.
Before and during the time it was written there were existing HTTP based web services that were successful and they didn't follow all the principles outlined in the dissertation. Fast-forward 15 years and the vast majority of successful HTTP based web services still don't follow all the principles. Some turned out to be more useful than others.