I think The Irishman was expertly paced. I started watching it at 1AM, because I had a long day at work and I couldn't put it down until I was done. Scorsese has made slow, meditative films that go on forever (in a good way, of course), especially when he goes all personal with stories dealing with faith, but KotFM seems to be one of those that suck you in, running time be damned, and spits you out when it is ready to do so. Absolutely no worries about running time.