HiFi vs MidFi

“I’d be curious to hear feedback on what constitutes HiFi vs. MidFi across various components.”

Perception?

No- intention, more than anything else.

Plotting a graph - a line of delineation between Mid and Hi Fidelity would be about as flat as a refined in room power response ...

OP’s very first inquiry a couple of weeks ago is:  “I’ve narrowed down to the Sonus Faber Olympica 3 vs. Focal Kanta 3. Source is McIntosh 8900 integrated amp. I’ve heard the Focals and loved the seamless soundstage and precision. Going to hear the Olympicas this Friday. These would go in our main den (~300 sqft) for listening to jazz, rock, and country.  Thoughts?”

Iy looks like you then purchased the Sf’s.  Congratulations!   A fantastic Hifi set up.  

I have a NAD C368 and Blusound streamer feeding PS Audio S300 amp and Revel Proforma3 speakers. My system sounds very good to me but I consider it entry level hifi. 

I think the system you are putting together will be fantastic.  

MidFi vs HiFi has nothing to do with budget, it has to do with the listener.  A HiFi listener seeks to get the most enjoyment and best sound he can while the MidFi listener is satisfied with the music as it is and isn't concerned with refining the sound.  HiFi is in large part a hobby while MidFi is a utility.