You're missing the point of 1. It's not simply "you can use globals", it's that you can rebind them in a thread-isolated way that stacks. Ruby blocks aren't re

You're missing the point of 1. It's not simply "you can use globals", it's that you can rebind them in a thread-isolated way that stacks. Ruby blocks aren't really first-class without getting converted into procs, and it's pretty un-idiomatic to pass these around like actual values. Even then they're not "first-class" as most calls happen via method calls rather than function invocation.