Community edition using 4 cores of CPU


I would like to clarify, that since community edition uses only 4 cores, is this restriction for only N1QL, or for all couchbase operations? So, to be more specific, if I run couchbase community edition on a 16 core machine, and I have 1 bucket with 16 map-reduce views, will all the cores be used to build these 16 views in parallel, or will only 4 views be built in parallel, and the remaining 12 cores be idle? And if i run an expensive n1ql query, will all cores be used or just 4? Im looking to conclude that is it really beneficial running couchbase community edition on a machine with more than 4 cores?