I occasionally am happy to point out the 150+ isps now running libreqos and cake... the several hundred running preseem and paraqum and bequant...
As a rule of thumb about 10k wisp subscribers eat around 25gbit. This we (libreqos anyway) can do easily on a 1500 dollar whitebox (and we have pushed it past 60gbit in the v1.5 release entering beta shortly). This is usually way more capability than any given isp network segment needs...
The wisps have got fq codel available native in much of their gear too, and of course starlink on their wifi...
There are probably 60k isps left to go though. There are isps still on docsis 3.0. I tend to regard these issues nowadays as being demand side as these solutions are so widely available now...
But with billions being spent to just upgrade to fiber... a dark cloud ahead is above 50mbit most of the bloat moves to the wifi... and despite eero, openwrt, Google fiber etc that have been getting it right... sigh.
A bright light at the moment there is all the wifi products coming out with a mt79 chip.