"It's also worth noting that the Tor network only uses about 50% of the advertised bandwidth. But this is a good thing, because it helps reduce latency and congestion."

Yes, but less than 1/3 of all Tor relays are exits ( https://metrics.torproject.org/relayflags.html) and exit bandwidth is much lower than total bandwidth: https://metrics.torproject.org/bwhist-flags.html