This review was written for, and will be published by, Blickpunkt Musical, the German magazine on international musical theatre for which Mr. Dwyer is US reviewer. For many Stephen Sondheim fans there’s never enough Sondheim. The pandemic generated even more virtually, including a wonderful 90th birthday celebration, previously reviewed in Blickpunkt. Now along comes “Simply Sondheim”, an original concert created and produced by Signature Theatre in Arlington, Virginia - r