It really depends on where and when. I've got a small stack of multitools, and generally I use the blades on all of them. A short rundown
Skeletool CX- modified tip to make a more sheeps-foot profile, climbing rescue tool
Rebar- lightweight tool, currently for general purpose urban/ audio-visual job use
Surge- I'm currently working maintenance in a factory, so it gets a lot of use, cutting hoses for new air-lines (we use a lot of air-tools) removing old belts or crap from machine axles, etc
Swisstool, the main knife in my "controlled evacuation" bag
Main reason, while I can get away with carrying another knife at work, and often carry a small slipjoint on off days, the multies mean I can carry a "tool" and a knife with a lot more legal leeway, and its not a detriment overall. If I need to sharpen it weekly over monthly, big whoop. Most people are more comfortable with a multi, and up until this job, I've always been client facing. So for me, it's just a "aint broke" sort of thing. That said, I can easily add a small fixed or folder if the conditions warrant, but as a baseline, I get away with the multi's just fine.
That's not to say that there isn't another knife of some variety far away. My lunchkit, EDC bag, and car all have other knives in them, so I'm sure I'll make due if something were to need cutting.