Modern AV Receiver vs Amp / Pre-Amp separates? Genuine question

Do modern AV receivers (mid-range price on up) with the latest DACs deliver the bulk of the musical experience that a separate AMP+DAC or AMP+Pre-Amp+DAC can deliver for about the same price?  What if one purchased a twice as expensive Amp+Pre+DAC combo, would you necessarily get 2X the musical quality and experience?  I ask this because I think there are quite a number of folks who believe for the most part, clean, powerful amps pretty much should deliver the same sound, with no significant differences.  Some believe that a pre-amp could improve sound, but perhaps it's due to better impedenace matching at play.  In other words, maybe the dedicated power supply, higher quality inner components, and cleaner circuit and cabling bring some benefit but not necessarily musical experience improvement in direct proportion to the price increase.  And a well designed, modern receiver with modern dac and direct-mode for 2-channel audio can be nearly as good for less money and greater simplicity.  Also, the room settings of modern receivers may also be a distinct advantage of a modern receiver over separates.

Do most of you agree that it's easier to tell the differences between speakers, DAC and sources than it is to tell the difference between amplification sources like recievers vs pre-amp/amp/dac/source combos?  Would there be greater diminishing returns for the money when looking specifically only at receivers vs pre-amp/amp/dac/source combos?

It seems some blind tests conducted found that listeners were hard pressed to tell the difference between amplifiers, or between receivers vs separates.


What are your own experiences?