Is there any reason to buy a RJ45 > DB9 console cable and separate USB adapter as opposed to a RJ45 > USB cable?

I just got my first enterprise switch and I need a console cable. I have the option to buy a console cable with DB9 connector and USB adapter combo like this or I can get one which is RJ45 >USB directly like this one. I can't find an answer to this question anywhere. My proclivity is to just get the straight USB model but then I began to wonder if I would ever have a need for the serial connector.

Which should I get? Thanks!