I think the NN have got to realise that moving to another country, such as America, won't mean they always get to go to buffets, and moving to England won't mean that Sockie gets to meet Gordon ramsay 24/7. They live in a very good place with regards to youtube though-nearby mall for shopping challenges, big park close by, lots of other assorted entertainment-y places that can be handy whilst filming. There's also a surf nearby and skateparks-there house is in a great location, and I feel like that's why Justin (I think) doesn't want to move, cause he knows they may not find a better location for filming etc.
Also, I feel like they do still skate, just not in-video, because why, if they were doing a shopping challenge for example, would they need to go skating randomly halfway through it? We did used to see them skate in videos but that was because they did less challenges and more vlogs, so it makes sense. I don't know. I just feel like they do still skate, just off-camera