In the war there was an advert that said 'Is your journey really necessary?' I think that is what should guide our decisions now.
When families are spread all over the world, there will always be family meetings and a desire to see each other. IS there any one on GN who would voluntarily decide that their only contact with a grandchild, say in Australia (for Uk based members) was by skype? I doubt it.
It is the same with business. Many meetings can be and are by skype (few companies can afford to pay for unnecessary overseas visit), but many require site visits. DH, currently has three, four or more skype meetings a week, but at least once a month he has to fly out to a shipyard to survey a barge and issue a certificate to the insurers that the barge meets every requirement for it to safely carry windfarm components out to sea. That is not something that can be done on skype.
Many small foreign countries, island groups especially in the West Indies and Pacific are economically dependent on tourists.
It is a compex subject and the follow up to 'Is your journey really necessary?' must widen to ask 'To whom is my journey absolutely necessary?'