How often do you upgrade turntable ?

Like an oil change in the car, every 5,000 miles. ;^)

Sorry @inna, don't mean to make light of your question.  But it seems as long as one is satisfied with the performance and nothing breaks or wares out, why replace?

Yes, why replace ? Only to have something even better. Many keep their turntables for years, I suppose their speakers too. The rest usually gets upgraded more frequently.

"How often do you upgrade turntable ?"

I wouldn’t call buying 40yr old mint TT an “upgrade”! I have bunch of TTs, and  “timeless engineering marvels” regularly added to my collection.

In one system here there is a VPI that started off as a junior. Over the years it has finally been upgraded as far as possible sans the SAMA.  The Superplatter was a huge upgrade for this unit. Also the SME V arm was huge as well.

I went from a Yamaha when I was a kid... to CDs are wonderful, to a VPI Scoutmaster, to a Brinkmann Bardo. If money is right a Kuzma four point and a Lyra Atlas will grace it, but I'm pretty happy so if nothing is changed I would be happy.

My original comment was tongue in cheek as audiophiles we are always searching for that next improvement. My buddies refer to this condition as "needles for junkies":!