I am a huge advocate of simplicity. I think you, or indeed anyone, would benefit from a bike they like riding and can cope in any conditions. How interested are you in being the fastest rider on the fastest bike? Or would you rather "suffer" being a little slower by having a jack of all trades bike, that could still be just as fun to ride?
One bike is simpler and cheaper, and you can forget about it till it breaks. It's up to you to decide what compromises you want to make on that bike.
But maybe N plus 1 is always right, what do I know! 😉