I would really like to see the results of this research to understand what is going on there.
Make sense now why Cloudflare would be one of the only companies that could handle it!
Mostly everyone could handle this, not just CloudFlare.
The last public analysis was done in 2010 by RIPE and APNIC. At the time, 1.1.1.0/24 was 100 to 200Mb/s of traffic, most of it being audio traffic. In March, when Cloudflare announced 1.0.0.0/24 and 1.1.1.0/24, ~10Gbps of unsolicited background traffic appeared on our interfaces.
https://blog.cloudflare.com/fixing-reachability-to-1-1-1-1-g...