Interrupt Question

Using Arduino Programming Questions
9

At least two...

  1. The added complexity. Getting the details correct can be extremely difficult. Even for seasoned professionals.

  2. Overhead. Entering and exiting an interrupt service handler can be an expensive journey (in CPU time and, to a lesser extent, SRAM used).

Interrupts are like a stick of dynamite. The average person will go their entire lifetime without needing one. But, if you do need one1, you can't live without it.

1 For example, to shift an especially well anchored very large tree stump.