5Ghz has 500Mhz worth of total bandwidth, while 6Ghz has (in US/CA, and hopefully in EU eventually) 1200Mhz. That's over double.
6Ghz has more 160Mhz channels (7) than 5Ghz has 80Mhz channels (6).
In reality, a 1x1 80Mhz connection gives you a 600 Mbps PHY rate:
* https://www.intel.com/content/www/us/en/support/articles/000...
* https://superuser.com/questions/1619079/what-is-the-maximum-...
Even if you halve that, how many online activities are going to make use of that bandwidth? And if you have a 2x2 client, you double it anyways. A 1x1 40Mhz using 802.11ax will give you a max PHY of 287Mbps. How many activities use >100 Mbps, especially continuously?
Off the top of my head: certainly downloading a new game or software updates can eat up those bits, and photo/video editing or creation (local NAS or uploading) it might be useful; are there any other activities that use that?
As I commented elsewhere: it would be great if residential Wifi devices defaulted to 40 MHz.
About 40% of the US population lives in a coastal county:
* https://coast.noaa.gov/states/fast-facts/economics-and-demog...
About two-thirds (66%) of the US population lives with-in 100 miles (150km) of the border:
* https://www.aclu.org/news/immigrants-rights/your-rights-bord...
The US population is more concentrated than many people realize.