Have you found your "End-Game" speakers yet? I have. And it feels so good!!!

Depends what you mean by "endgame".  I have had my Tidal Contriva Diacera's for about a decade now, and will never get rid of them.  At some point I might buy another pair of speakers with different driver technology to also have in the audio room just for a change of pace (e.g., a top of the line planar, MBL 101)

audioman58

Trying your best to burst his bubble? So, price is proportional to quality of sound.

At 83 years old I doubt I will be moving on from my recently acquired Sonus Faber Sonetto V speakers.

I am aiming at a pair of Stenheim statement or Kharma Exquisite midi grand.  Honestly in today's inflated market, you won't get "end of game" speaker for anything under $100K.  $150-$250 K is more likely.

OP, “…Over the years, my speaker "Revolving-door" was a learning process for me…”

Was your door also revolving with respect to electronics? Since many different speakers will require very different electronics to sound their best. Or did you keep your electronics the same and swap speakers until you got a solid match?