For audio output (the majority usecase, I'd argue), this didn't matter much. Left and right audio output _always worked_, and in my experience, at least the play/pause button worked fairly universally as well.
The part that shipped was Electrolysis which splits the formerly giant-single-processed Firefox into a set of 1-9 processes which work as task pools for tabs. Locking one tab hard will lock only that tab, and any others sharing that Electrolysis worker I believe.
The new upcoming part is Servo, the rendering engine written in Rust.
I crunched the math earlier and it's something like... 35c a day for a reasonably standard North American tech worker workyear?
Doesn't seem that bad, especially to avoid the hassles of coordinating remote teams' standups (hell, even some colocated teams could benefit from this).
In a sense we already have that, in the form of the `community` repo: Trusted Users mark a package as safe, adopt it, and it gets packaged up and supported.
Perhaps the answer is a few more TUs to get some of the popular AUR packages adopted and officially supported.
We've had $1 coins for a hot minute. You can almost only ever find them at the bank, post offices, and some other government places (the Sound Transit ticket kiosks here in Seattle spit them out, I found out last week), but they exist.
We also have/had a 50c coin, but it's huge and I believe out of circulation these days.
Name recognition, employee familiarity (I've used Slack at every job I've worked since early 2015, I pretty much know what to expect from it always), and punting maintenance costs (this is probably the biggest factor).
I love IRC and XMPP. I'd love to run one of those, or some new service (Matrix?), at work. However, my time is arguably better spent doing anything _other_ than maintaining such services, and the same goes for most engineers at most companies, sadly.
Side factor: the mobile clients for IRC and XMPP almost universally suck, at least on Android. I imagine if those problems had been solved in a reliable way, more companies may consider them (assuming the allocation of engineering resources problem isn't a problem).