Btw, some people collect hones like other people collect razors.
And some people just like playing with different types of hone to see how they compare to others.
And then again, some people hone lots and lots of razors, and sometimes razors react better to one type of hone than another. Or some hones work better for a specific purpose and that's why they end up with many different type of hone.

But none of those people are just maintaining their own handful of razors. Otherwise they wouldn't need more than just a finisher (or a pasted strop for that matter) If all you do is maintain your own razors, a finisher or a pasted strop is all you need.