Sure, that's pretty close to what 'use' does now, but the 'eval' helps future-proof your code. The hand-rolled import isn't clever, it's just extra work. Laziness is one of the three pillars...

The common efficiency and security disadvantages of 'eval' aren't issues here because (1) run-time 'require' must do an 'eval' eventually anyway, and (2) the 'eval' uses a string constant that is easy to understand and verify.