I've been here for more than ten years now. It really is beautiful, and the opportunities to explore Europe have been incredible. But Switzerland is a notoriously unfriendly country and maintaining friendships here is work. Plus our parents are ageing, we miss being close to family, and I especially miss living by the ocean. Going back was always a possibility as an early retirement plan - it's also too expensive to retire in Switzerland.
Mountains and meadows are nice for a while, but driving six hours in the era of carbon footprint reduction to get to a warm bathtub (the Mediterranean) gets a bit stale.
We had a work opportunity that gave us the chance to live in any of a few different cities. We chose Switzerland so our kids could learn another language and we could travel from a fairly central location. Definitely achieved those!