A few folks have made posts mentioning that they have no need to carry a knife, which I do not doubt, however I use one daily for an abundance of tasks, I would miss it.
I carry a Doug Ritter RSK in my pocket and a Leatherman Wave in my bumbag and only this morning the wheel on my son's pushchair fell off when we were in the park, without the multitool I wouldn't have been able to undo the cotter pin to re-fit it.
Add to that...
Peeling fruit, cutting bread, cutting dried sausage. Opening bags of milk (with the scissors on the Wave). Fixing a gate lock in the woods nearby (making dowels from a branch and screwing the fitting back into the now worn holes with the Wave), cutting up bits of ribbon fired from those party popper things and left hanging from trees etc. etc.
In Hungary, the legal carry is any knife fixed or folding with a blade length of less then 8 cm. If you want to carry something larger you should have a reason to do so.