I am also interested in this topic.
I have 70+ C9300 clusters running NM-4G with IOS-XE, and I wanted to convert them to Meraki.
I would like to avoid having to buy 140+ NM-8X (list price $3000 /cad), In addition to the cost, it is something we do not need since we do not use SFP+ and do not require more than 4 uplinks.