So I do get all the advantages of a connected device, but if the adapter is bricked, I can easily replace just that small device. And more likely, when there’s a new standard, most of my equipment is unaffected.
I believe you're missing the forest for the trees. My argument is invariant to the specific device we're talking about.
With electronics you can still isolate functionality like in software how we wrap things into functions. But like software sometimes we need to break that for optimization. Think like Apple M chips. They do it in the most annoying way, but integration is helpful. Ideally in a speaker though you should be able to fuck everything up and still allow for raw input.
As for the Apple thing, well that's a bigger issue because we really should be using open protocols and fuck walled gardens. Walled gardens are part of the problem we're talking about