I don't anticipate Cisco training Meraki support on for rugged wireless devices anytime in the next 3-5 years at least. That's just a guess from someoneon the internet who doesn't work for Cisco/Meraki.
As an example, Meraki support might be asked about additional connector options (like M12) for harsh environments.
https://www.youtube.com/watch?v=7IEvy0Di_R4