Honestly I'm hazy on the details but we're running a fairly complex environment in GCP with PSC everywhere, connections to on-prem and other external environments, and something wouldn't quite work due to all that.

Sorry I can't provide any more details but I really don't remember the specifics. We were in touch with Tailscale engineers and they offered some workarounds that we had already worked out but that wouldn't help us achieve what we were after.