Will very high quality 30 year old gear outlast the stuff made today?

Will very high quality 30 year old gear outlast the stuff made today? Maybe this should have gone into the DIY or classic sections, but here it is. I personaly own and listen to on a daily basis some great vintage gear that continues to work flawlessly, on the other hand I have had less luck with the stuff from the last 15 years or so.

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