How many people do you think have the same DAC, amplifier, and speakers

Same DAC? My guess is ... about as many as there are sold?

If you meant the same DAC AND same amp AND same speakers ... given the amount of brands and types I'd indeed say 4.

My room is every bit as important to the sound as any piece of equipment I have ever owned. 15 years and counting with the same room whereas many pieces of gear have come and gone. That makes it very unlikely to be replicated by chance.

Hi everybody!

My setup:

Esoteric K03XD,Esoteric N05 XD Dac,Preamp Pass XP22 and two Pass X600.8 , Wilson Alexia speakers ( waiting for the arrival of two Alexx)some Transparent Cables. 
Best regards!

I think it depends on what the system is. I bet if you looked at owners of the Wilson Wamm over 25% own the same gear. I Wamm, D’Agostino relentless, dCS Vivaldi stack. 
 

Not sure there is anyone with the same system I have. That said my system is a bit lopsided right now where the front end is close to 4x the price of the speakers. 
 

Rockport Atria II 

D’Agostino Momentum HD pre and M400 monos

MSB Discrete Dac

JL f110v2 x2

The formula to calculate the probabilty of this happening is:

Speaker Impedance x Source Sampling Rate x Amplifier WPC. 

You're more likely to be struck by lightning.