A lot of places overheat the milk until it becomes "construction foam" (Bauschaum). That would explain the bad taste.
I'm frothing milk at home when I want a cappuccino, so I put it into a metal vessel and hold the vessel with my hand during foaming so I can feel when the milk is nearing 80C (feels uncomfortable)
But as coffee goes, everyone has their own taste, so if you prefer cold milk - you do you. (I have another friend who likes the milk scalding hot, close to boiling - when she's visiting I'll make her coffee like she prefers, even if my mind goess "THIS IS SO WRONG")
IPV6 is already rolled out in parts of the world. My provider has a Dual Stack lite architecture, the home connection is over IPV6, IPV4 is normally being tunneled via V6 through a provider grade NAT.
As I AM a network nerd, I pay for a dedicated IPV4 address every month, so I can reach my stuff from outside from old IPV4 only networks.
So when I plug in my router, connect a windows machine and just google stuff then all this traffic will be IPV6 without me configuring anything.
It's so great fun having the attack surface being doubled by dual stack setups.