[xs83]

This doesnt surprise me, I wrote about this not long ago and how the Cloud Providers are only paying basic lip service to MQTT and IoT. There is not one single Cloud Provider that implements MQTTv5 properly (Azure implements a subset of it), and considering it came out in 2019 after being in "close to final draft" status for several years before that, the clouds have been very slow to pick this up.

I refuse to believe that anyone is actually using IoT Core on AWS or GCP for modern MQTT workloads. Pulling data in from a few "things" - sure, but industrial level capability across multiple systems, I really don't see it.