I use five-bladed Gillette razors. They are expensive, but although I have a pretty tough beard, I find that I can use one cartridge for 4 months before changing it. It’s slowing down some toward the end, but it still works.
And I use one of those blue plastic two-bladed French throw-away razors for the difficult bits around the ears & nose, maybe once or twice a week. They last a year or more at that job.
Yep, Gillette Fusion. Every now and then ‘hone’ it back-forth on a leather belt.
It’s the microscopic burrs that ‘catch’ on your skin.