I view a multi-tool as what you use when you can't get to your real tools. It's an emergency stand-in. A Jack of All Trades, Master of None.

I just don't find the ergonomics of any multi-tool to be good. They are clever, but cumbersome and awkward. However they can help you complete a simple task in a pinch if you have nothing better to work with. They are good in that role. But as a general replacement for real tools ... not even close. I'll take a folding or fixed blade knife over a multi-tool any day.