I've seen humans generate code with syntax errors, try to run it, then fix it. I've seen llms do the same stuff - it does that faster than the human though
It's an activity indicator, it doesn't necessarily correlate to anything other than transmission or receiving is occurring. I would also not assume that they work the same between brands. Some devices may have a separate link light, others may not. Some will have a combined tx/rx light, others separate. Some vendors they're configurable. Some vendors use them to indicate things like device boot state. Etc
It's not a gimmick though, they're still useful for that purpose.
Ataturk famously switched Turkey to a modified Latin alphabet instead of an Arabic-based one in order to boost literacy rates. Combined with a huge push to educate people on the alphabet it seemed to be successful.
Hadn't heard of it, reading up on it I think my employer (a very large company) has already implemented a form of it effectively. For us it's taken the form of a trusted auth service for all of our internal websites/services with everything now being directly Internet facing. This means that you can access (almost) everything without a VPN from anywhere, and it removes the idea of "internal" traffic being trustworthy. It's mostly been pretty nice from a user perspective.
It also sounds like a buzzword that a lot of companies are trying to use to sell you bundles of saas products.
You should see my "very corporate" company's slack - tons of emojis all the time. That said we don't put them in anything official.