For their big #150, it was another “old order changeth” issue with lots of reprinted material from Avengers #1. Back then, there weren’t trade paperbacks and reprints everywhere for cheapsies, so it was probably kinda cool to read the Lee/Kirby stuff. For some readers, I bet it was the first time.
By today’s standards, it was filler.
Actually, by today’s standards you’d never even get to #150. Everything reboots every couple years.
I like the high issue #s. Makes me feel like I’m part of something with tradition and history and depth and weight.