It’s always sad when a service you’ve used is shutting down. Foursquare (the end) was one where I saw it coming for a long time, but that does only to some degree soften the blow. Foursquare (and later Swarm) was the service that introduced me to location-based services. My first check-in was on 2010-01-10 while exploring the city of Graz, where I had moved to a few months earlier. From then on, pretty much all the way up to 2019, I’ve used the service to keep track of all the places I visited on my trips - from conference to...