Why persist with Wifi?

Is WiFi still relevant for new trains? ( RAIL 865)

I travel regularly between Inverness and Glasgow and London on the Caledonian Sleeper (even with its old rolling stock, this is an incredible service, by the way).

Except in some of the depths of the Highlands, there is 3G and 4G coverage on my mobile network (Vodafone) almost throughout the journey, one of the longest on the whole rail network. And it’s good enough to watch entire programmes on BBC iPlayer without any breaking-up of pictures or sound.

And as data on mobile gets cheaper, and quantities larger, is WiFi investment worth it, particularly as public WiFi networks often require effective local management intervention to stay online? There are also public security and legacy technology issues. Fred Silver, Stornoway