ORCiD can store more than one email address against a profile - useful when moving institutions.
The University of Plymouth has an expectation that all research active staff and all doctoral research students who do not already have one, will create an ORCiD account & connect it to Symplectic Elements. This statement is supported by DVC Research & Enterprise, Jerry Roberts.
Having an ORCiD profile improves author attribution for research, and is now an expectation of many research funders and publishers, requested and used within some grant application processes and manuscript submission workflows. It is likely to be mandated for the next REF, and is supported by several online services, including Research Fish, Scopus, Web of Science, VV Impact Tracker and Symplectic Elements - where having an up-to-date ORCiD profile can make the claiming of publications easier.