Can anyone tell me in which country I can use 5G network as a regular consumer? I don't really understand the author point if there is nowhere I can access this tech.

Also, having a 5G network with lots of restriction won't bring much usage. I prefer to have a good 3G unlimited connection than 5GB at 4G speeds. Same thing for 5G. If we cannot have unlimited (or close to unlimited) data then new usage cannot really be developed.

Edit : typos.