There's nothing wrong with owning a single razor. It just means that, unless you learn to hone it, it will be out of action every time it needs honing. And it will need honing more often than if you had a couple of razors, since the purpose of owning more than one (apart from some kind of addiction ) is to rotate them so that you get an overall longer non-honing period.

Apart from that, people find that as they gain experience they gain curiosity. We don't all know at the beginning what kinds of razors we prefer, or indeed what kinds might be out there. It is unusual, though not unheard of, for people to stick with just the one they bought initially. Most of us look around at what else is out there and sometimes pick another one or two (or 500!) up along the way.

James.