[xoa]

>What does "fast" even mean?

Simple and objective. "Fast" equals current standard deployed wired LAN speed, so right now about 1 Gbps symmetric (technically WiFi has exceeded this but in practice there is far, far more discrepancy in advertised vs actual WiFi bandwidth). I would be willing to accept arguments about delayed ramp ups and the like, so after 10 Gbps becomes standard industry wide for wired LAN I could see WAN upgrades taking x years, but in basic principle the only difference between WAN and LAN should be latency (should be mostly irrelevant except for special applications and continental/intercontinental distances), SLA/uptime responsibility and guarantees, and who exercises network control.

You're taking a typical argument from incredulity without bothering to actually give this any particular thought. It's frankly pretty simple and certainly not a technological challenge either. What should we be able to use the Internet for? At least the exact same stuff we use our LANs for (plus more). Again, I invite anyone who argues that 1 Gbps or more is "unnecessary" to go right back to 10BASE-T for a month on their home & office networks and see how that works out for them.