Fritz Lewis’s review published on Letterboxd:
I'm going to have to watch this again to give an in depth analysis, but I really admire this film and the craftsmanship behind it.
I will admit that the first couple hours or so felt a little too restrained and nostalgic at times, like Scorsese was just reliving the good ol days and cruising off previously explored territory, but the last hour really justifies the more glacial approach and gives us the real reason why he's telling this story.
You just really start to feel it, mainly from De Niro's sobering and broken down performance, which from those final few scenes alone, showcase some of the best acting I've seen from De Niro in decades.
Either way, I guess bt default, this is probably Scorsese's most mature work as a filmmaker, and I'd be ready to give this staggering runtime another sitting in the foreseeable future.
But for now, on a scale from theme park to real cinema, I'd give it a solid Casino and a half.