Leaky abstractions are precisely why it's important to understand what's going on at least one level below where you're working at. This has always been true of

Leaky abstractions are precisely why it's important to understand what's going on at least one level below where you're working at. This has always been true of computers, whether you're working at a script level, system language level, assembly, or even hardware. Eventually something will break the abstraction, and on that day you'll be there looking at that stack trace or register + memory dump or burnt out nand gate or cold soldered capacitor or faulty wall circuit, and not knowing what to do about it.