Yeah, Google policy was to migrate everything to Spanner, not a technical decision. > Are cross-server transactions scalable? Would anyone architect a system t

Yeah, Google policy was to migrate everything to Spanner, not a technical decision. > Are cross-server transactions scalable? Would anyone architect a system that did them en masse unless they absolutely 100% had to? As a long time Vitess user and contributor/maintainer, this perfectly describes the issue. Minimal effort has been put into solving cross shard / 2PC transactions because a well designed system rarely needs it.