So I shaved with an open razor for the first time today. Not a proper hollow-ground steel, but a shavette, which is a handle that takes regular rzor blades split in half. With only one tiny cut, I managed to kinda get a proper shave, but it was slow. The ergonomics of it are weird; to hold it comfortably, you can barely see the blade in the mirror.
I had to finish off shaving with my regular Merkur.