I do get homesick, but only for people and a good Indian/Chinese takeaway.
WhatsApp/FaceTime etc means we are in contact daily. EasyJet means that our family and friends are able to come out often, sometimes for as cheaply as £40 return!
As my parents are aging, I am feeling the pull, but my parents don't want me to ever move back to the UK. They said if they were younger, they would have left. My sister is also round the corner and will never leave our home town, so there is no issues there. Our children receive wonderful schooling. DS has ASD. The provisions he receives are quite frankly, amazing. We aren't rich, by any standards, but we have food on the table, a few camping and driving EU holidays a year, and we are happy.
We have such a wonderful wonderful way of life, our host country is beautiful and we adore it, we are integrated, the DC are bilingual, we have qualified for citizenship (but haven't taken it yet, we will though, esp with Brexit). When we go back to the UK, all I can see is litter, litter, litter, empty shops, dying town centers, drinking issues (I am from NE) and poverty. Society is broken. Services are at Breaking point. And don't even get me started on the weather. My friends all seem to be working to live, which doesn't seem like a healthy lifestyle to me.
That said, I do miss the sense of humor and the kindness of the locals. Geordies are (to me) culturally, the kindest, loveliest people I have ever come across.
In the event of a family emergency, we would of course go back. And I would like to buy a UK property, just in case. But it would be a very very very unhappy move, for me, DH and our DC.