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I would say this is a quick response to a loaded question. There are LOTS of benefits of eBGP with a MX and yes you could work a round this with round robin DNS or load balancing, etc.. but there are big benefits to BGP too.
Welcome to Meraki MX..You can pair a ASA/Firepower, etc with the rest of the Meraki stack and get the better of both worlds..then you get to vPC, etc and wish your nexus came back.But for 97% of things Switching, Wireless and Video Meraki does it wel...