I don’t think the capacitors really wear out over time; instead, the electrolytic "paste" reacts with the metallized container or wrapping IIRC.
Other types of caps should not be (as) affected, but 10, 15, 20 years is about it (tho my Sunfire amp is still going strong).
Other types of caps should not be (as) affected, but 10, 15, 20 years is about it (tho my Sunfire amp is still going strong).