I can see wifi being a problem if the H2O's wifi chip is so old that all it has is a 2.4GHz radio and/or supports older wifi standards like g or n when the only access points available are 5GHz and/or only support newer standards like ac. Sometimes you don't get to choose what radio to connect to the access point with or even have admin access to the networking equipment to configure things, so I could see some situations where lack of network access on older devices to register could be a problem as time goes on.
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