Longevity of ownership

Maybe ask, "Do you have any gear you have owned for less than a decade?"

Most definitely.  Lots of mods, upgrades, and configuration changes over the years, but have had the same main speakers, tube amps, and tube preamp for over 35 years.  My CD player has been with me for more than 30 years.  

My Ariston RD11S turntable I bought new in 1977 from my local HiFi store for $380. Since it was sold without arm I bought from the same store a used SME arm for $150. I still have the Ariston in use, now with a Grace 707 arm and Denon 103 cartridge.

My Oldest owned items, used for nearly a decade within the current audio system, go back to the 1950s as a produced item.

Wind the clock forward; other items used for nearly a decade within the current audio system are from an 80s production.

There are commission-built items produced in the 90's and early 00s that are the backbone of the current system.

There are commission-built items that are older than a decade and younger than a decade used within the current system. 

There are currently commission-built items as newly produced and completed builds, and commission builds ongoing and soon to be completed.

I bought my Basis 2500 turntable w/ Vector 4 arm in 2002. Replaced belt once & got a new cartridge a couple years ago. Still sounds great & rivals my very good digital sources.