> but it's not particularly snappy Fast enough for practically all processors made today > it can't drive LEDs directly That depends on the design, but CMOS

> but it's not particularly snappy Fast enough for practically all processors made today > it can't drive LEDs directly That depends on the design, but CMOS chips generally have much better symmetric output characteristics than TTL ever had. Most MCUs can drive quite some current on the output pins, and 74HC and similar logic families can certainly drive LEDs.