Besides reliability, power, and longevity, I also find value in not only availability of replacement parts... But cost of replacement parts. Can you get a cylinder head for a 20 year old <6cc OS engine shipped to your door for less than $13 directly from the OEM in Japan? Piston and liner for $40-50 direct from the OEM in Japan?
I'm gonna bet the answers to either of those questions are no - and that's okay. You find value in what you buy/use, and so do I. I just look at it from a different angle with different criteria that determines its value.