[Scottopherson]

Jeez that's a big paint brush you're slinging around.

That's the problem when non-front-end guys make decisions about tech sometimes, they choose stuff that seems easy to integrate without caring about things like accessibility, design scalability, client device capabilities, etc.

[nine_k]

How does a wire protocol relate to UX concerns like accessibility or design scalability?

Client device capabilities are there, MQTT is neither rocket science nor a resource hog, since it was designed for underpowered IoT devices.