Well said, to add to this, HAProxy is also closing the gap on convenience with its recent addition of AWS EC2 service discovery [1] and Consul service discovery integrations [2].
Wow, cool. HAProxy is coming a long way. Consul integration makes me excited to take another look at using it for our mesh. Using Fabio right now, and it's fine, but I'd love to go back to HAProxy for this if it makes sense.