Watching the Weather Channel, it’ll sometimes air episodes of northern Canadian pilots still flying the old birds. Really remarkable machines.
Buffalo Airways seems to have collected 6 flightworthy airplanes and many many many spare engines, they seem to make quite a enterprise of shipping engines around canada and the untied states. There is tons of DC3 porn on their shows and youtube.
For north America.
There were 20+ to fly into oshkosh for the 70 years past D-DAY and nearly 30 at D-Day 70th. I think a flight of 10 made the trip from Halifax to the Ireland/UK/France on a single day. There provably are 30 doing cargo flights on demand, and another 40 flying to airshows 100+ hours a year. Another 40 in the US flying occasionally or just being someones private ride. Beyond the trainers, it is the most common airshow bird and fan club hauler.
The place they are not at is Africa because 100LL is $10/gal anyplace one wants to do a cargo hop to.