It depends on your lifestyle and what you do

From MY experience, I noticed the two most commonly used tools are the knife & the pliers ( in that order ). A SAK has no pliers so it is out in my case. Multitools do have pliers but they are heavy and have a dozen tools that I rarely use, so they stay in the car and inside the bag. What I cary in my pocket and USE DAILY is a folding knife.

In addition to cutting, I use it for light prying ( like half an hour ago, I pryed out a dead battery out of a clock).

There is a medical problem in my right hand which affects the use of my thumb, so the folding knife comes in handy in many of the day-to-day chores. For example, instead of exerting more pressure to open a stubborn packet , I just cut it or poke it with the knife .... that makes my life easier.

A multi will be a bit too heavy to carry around , and the tools are rarely used in my case. So, MT's stay around here and there , but not in my pockets

So, again, it all depends on your lifestyle & situation