What is the average life expectancy of a DAC?

@jaytor 
I have a similar DAC path, only with a Wyred 4 Sound DAC-2 DSD v2.2 in between my Yggy and Terminator.  I recognized the benefits of moving up the DAC chain, my experience has been better DAC's cost more.

I found the Yggy better than my CD player's DAC but mildly unsettling at times.  The W4S was smoother and more detailed with better low end but still occasionally strident.  The Terminator was a big step up but still at moments left me wanting.  The Terminator Plus with Denafrips Iris DDC using the clock out from the TP is amazing.

I could always spend more and get better now.  Unless I get another upgrade bug (can't see these coming) I think my DAC will be good for at least 4 years and probably more before DAC's change enough for me to feel the need to change.

Just curious how everyone thinks about FPGA systems like the PS Audio Direct Stream versus chip based D/A systems. Does the ability to modify the system via a software update give FPGA systems a longer significant lifetime and therefore do they warrant a higher used price?

I like the fact that my Aqua La Voce S3 is designed to be upgradeable, but I bought it for how it sounds today, not in the future.  I bought mine 2nd hand for about 60% of retail, so I wouldn't say it commands a higher than average used price. 

I'm a little disappointed that it sounds exactly like a $100 Chinese DAC, but it's big and exotic and somewhat expensive, so it has boosted my fragile self-esteem.

As others have said, no moving parts just electronic components. I have had  a Meridian Direct (Director) for years. Its moved from my main system to my shop system. I’ve dropped it numerous times and it gets full of sawdust, still has wonderful sound. 

My JVC QL-Y55F turntable is 40 years old and still performs as new. And you’re all questioning if you can get 5 years out of a dac? 
Thank goodness for turntables. 

I bought my Ayre QB9 in 2007 based on hearing it at the dealer. Ayre has offered two upgrades since and the sound of each were worth it. So I have a current Ayre DAC but originally bought in 2007. I would research and try to find a company that will either accept trade in’s or upgrades.
Jaytor, the Levinson DAC has always been considered a leader in sound. Many who heard the Levinson in the early 2000’s would still swear today that it’s the best sounding DAC they’ve ever heard. DAC chips are a great thing but implementing them and designing something overall is what matters. I’d also add that I don’t really think that price point is a good determiner.