Lifespan of amps and preamps?

Hey Scott, far be it from me to say you should come out of the cozy hobbit hole you've built for yourself right now, but several things are really good now:

1. Streaming
2. DACs
3. Class D amplifiers

And while your speakers may still work, you may find your tastes have changed. I see those are 2.5 way speakers, I really like the form factor overall. 

Gear will last a long time, but at some point the electrolytic caps will need replacement, and you have to decide if it is worth it or you want to make a jump.  I would encourage you to think about a nice new integrated and speaker pair, perhaps with built in streaming, or perhaps with an outboard DAC.

Best,

E

If things are still working well and you enjoy the sound - keep your system! The grass is not always greener over the hill!

You didn't specify your source. Analog or digital? Both? Those would be the places to upgrade!

Are they totally dated, meaning past their intended lifespan from an internal component perspective?

No. But my memories a little hazy. You should check. Like in the Bruce Willis movie RED. Made before expiration dates and you're okay.

 I have to say it all still sounds really good to me.

See? Like Malkovich with the Twinkie.

 But I never really listen to other systems.

Perfect. This is the key to happiness. Avoid internet, magazines, and stores. You'll be fine.