I've had a core group of 5 close mates for 25+ years.
Over the past 5 years, they've dispersed out of opportunity or necessity. None were actively looking to leave the city / country, but one has ended up in Beijing, one in New York, one in Brighton, and two in Cape Town.
I also haven't had an office job since 2019, so no colleagues or new acquaintances in my life at the moment.
The missus and I always thought we'd try a different country at some point too, but having four cats and four dogs always put paid to that notion.
Over the last couple of years, animals have been dropping off due to old age. Our jack russel passed this past Monday and we're down to 1 dog and 3 cats now.
If we can stop ourselves from adopting any more animals for a couple of years, we will probably make a move somewhere for the experience.
My wife had a great offer in Dublin late last year, and there's a lot of opportunity there at the moment, so that could be on the cards.