Officially by circumstance, rather. Researched my where-to options during G+'s twilight, decided on STM, and you know the rest of the story...
Speaking of recently gone Google products: Plus successor Shoelace tripped over in the wake of COVID-19, while GPlay Music was replaced months later by the leaves-much-to-be-desired YouTube Music (to cut costs on licensing). (Can anyone sat "jump the shark"?)