Do Preamps only Need Two Inputs in the New World?

My new world would be less enjoyable without this full featured beauty, made 1962 to 1969.

https://www.audioclassics.com/detail?detail=MX110&nav=cat

I use a separate unit (Chase RLC-1) to get remote volume, mute, balance

I have a dedicated FM antenna in my attic, aimed at only 1 station's antenna (WBGO JAZZ 88.3), it sounds wonderful, have you thought about that?

and, I bought a CD Player with wheels

that’s got me playing CDs (and SACDs) in my main system more often, happily using a Sony XA5400ES I learned about here

I use AUX for my Reel to Reel Player

and, friends bring their equipment here, I can plug into an unused input of my Chase Remote Line Controller so we can instantly compare a variety of things, as well as play their cartridges in one of my tonearms.

Versatility is far more vital than simplicity for me.

I use one input for my dac, one for my phono preamp, one for my sacd player, and one for home theatre bypass. 

I use the input for my dac 95% of the time. I use it when I stream. 

a good pre does what a good pre does sonically and functionally -- like any piece of gear you choose yours based on your needs, sonically and functionally 

whether any specific user needs one at all is also entirely case specific

My Audio Research Reference 6SE has four balanced and four single ended. Even my ARC Ref 3 phonostage has two inputs.