The problem with DOCSIS though is contention; not 'headline speeds'. I'm sure you could have ran a gigabit network on DOCSIS back then; but since that all networks have split the CMTS nodes more and more. If you enabled gigabit in 2013 on most networks it would have ground to a crawl because there was too many users per segment. Since then the networks have split the segment(fewer people competing for the same resources) and also the tech has got better with 3.1 and now 4.0. It's not quite as simple as flipping a switch and giving everyone gigabit.
mlyle|2 years ago
High-split DOCSIS 3.1 topped out at about 1.5gbit/sec upstream shared among all customers on a segment.
martinald|2 years ago
metaphor|2 years ago
DOCSIS 4.0 spec[1] was first issued circa Aug 2019 and has undergone 6-10 revisions since.
[1] https://www.cablelabs.com/specifications/search?currentPage=...
Dylan16807|2 years ago
"up to 10 Gbit/s downstream and 1 Gbit/s upstream"
Most of the 4.0 improvement is upload.
3.1 wouldn't do 2Gbps symmetrical, but it would do 2Gbps down with a reasonable up.