I put together my main (reference) system back in the late 1970s. Outside of selling my turntable (Micro Seiki DDX-1000 with 3 arms) and replacing it with a Denon (that I also purchased in the same year as the DDX-1000) NOTHING HAS CHANGED.
I am still as satisfied today as I was 30+ years ago. I have not heard anything in the ensuing 3 decades that would make me want to remove any of the electronics from their rack or to move the speakers out of the way.
This is not to say that I have NOT listened to other options. For 2 years I had double 9s and Fulton J models in the same room and listened to both (never at the same time) before selling the Fultons. KLH 9 and Fulton J use the same electrostatic drivers which is why it took several years for me to make up my mind. Other speakers I've listened to include B&W, Rodgers, KEF, Polk, klipsch, DQ10s, JBL, Altec, BIC, EPI, ADS, Mission, Magnapans (and Magneplanars), Quad..... Well you get the idea.... Many of the speakers I auditioned I DID purchase, though they are not in my reference system. Other amps have been listened to... Ampzilla, McIntosh, Crown, Nak, Krell, Levinson, and even a Futterman but the ARC D-350 still anchors the rack.
Sure there is a LOT more "stuff" to listen to but so far nothing I have auditioned has made enough impact on me to want to move away from my initial decision. call me stuborn.... but happy