Slack's approach of being a glorified webview everywhere is really paying off (a bit of sarcasm here, but I see it as net positive)

We're pretty close to "Write once, (rewrite a bit,) Run everywhere"

lol yeah, the ux is great across all devices i have tried the app.

even the big UI update recently as completely overwritten how the old app used to look in my memory

the only feature i have tried and not really cared for is the "Canvas" feature

Slack is largely UIKit- and Swift-based on iOS. I suspect they are bringing over their iOS app rather than a visionOS-focused one, though.