The W3C docs are very developer unfriendly additionaly there is a significant issue with OWA vs the default mindset of CWA. Also OWL and RFFS not being the type of schema a dev is used to and until very recently no option to actually verify and control the shape of the data (there is SHACL now). Also no sensible examples of using the stack, using FOAF to publish open data isn’t the job for most devs! Finally the rubbish tooling, clunky DBs and only viable option is Java makes the whole thing a quagmire... however it has tons of value if you can get past all that friction, Enterprise Linked Data is an order of magnitude better than alternatives.