To be honest unless you are Elon Musk price matters.
The exponential increase in price of let's say a Ref 6SE over your LS7 will not give an exponential increase of quality reproduction.
Most of us in this hobby spend a LOT more money than one could justify chasing nuance and the thrill of a high quality new component.
Therefore; a cost benefit analysis isn't the best way to examine value of Hifi gear. It's more an emotional purchase. In my opinion long after the price is forgotten the thrill of beautifully reproduced music and ultra high quality gear remains.