Welcome to The Weekend Stream, a relaxing weekly review of notable digital-only catalogue titles. There may be no CD or vinyl, but there’s plenty of great new/old music to discover! And after a week away, you better believe we’re coming in hot! Billy Joel, 50 Years of the Piano Man (Columbia/Legacy) (Apple Music / Amazon) On the surface, this 50-track digital compilation-cum-playlist looks like a typical algorithmic survey of Joel’s five-decade career, with all the great radio hits rising to the top. But dig deeper and you’ll discover six tracks making their…