The real pain in the hindquarters with IGH hubs and tire repair are those with a coaster brake reaction arm that mounts to the chainstay...

I've only had to change the tire on mine (Shimano 7-speed), never had to repair a flat in the 9 months that I have had it. I really wish this old, second-hand bike didn't have the coaster brake but a hand brake instead, but this setup is common here in Scandinavia.