I have owned what was my father's Linn/Valhalla for well neigh on 40 years or so. He moved on to SOTA at the time and VPI after that. About 8 years ago, I gave it a thorough going through. R&R the lubricant for the bearing, new belt, releveling and retuning the suspension and retuning the Rabco tone arm. About 4 years ago I replaced the Denon 103 with a Hana EL. You can see it in my system photos.
It has been rock solid dependable. It's also rather lovely sounding if I do say so myself. It suits.
Yes, you can fall into the trap of a never ending series of modifications or "upgrades" or, you can just enjoy it as is. I've preferred the latter and never regretted it.
Happy listening.