Failover is a major difference I find between Cloudflare and Stackpath. Just a WAF with more options for failover or load balancing would put things on equal footing. This was based on my last trial back in November.
It'd be great to understand a bit more about how you'd like to see this working. The WAF product team report into me so I can get a discussion going with the right people if you'd like to email me: david.mytton@stackpath.com
