QUIC is not quick enough over fast internet

> We find that over fast Internet, the UDP+QUIC+HTTP/3 stack suffers a data rate reduction of up to 45.2% compared to the TCP+TLS+HTTP/2 counterpart.

Haven't read the whole paper yet, but below 600 Mbit/s is implied as being "Slow Internet" in the intro.

Internet access is only going to become faster. Switching to a slower transport just as Gigabit internet is proliferating would be a mistake, obviously.

In terms of maximum available throughput it will obviously become greater. What's less clear is if the median and worst throughput available throughout a nation or the world will continue to become substantially greater.

It's simply not economical enough to lay fibre and put 5G masts everywhere (5G LTE bands covers less area due to being higher frequency, and so are also limited to being deployed in areas with a higher enough density to be economically justifiable).