Here, here. The Mars Rovers have far exceeded their expected service life (at least one of them did).
They both did - they were only supposed to last for months, and ended up going on for years. I think the one just got shut down a couple of years ago - although I think they booted it up recently to get some basic data from it. Or perhaps I’m thinking of one of the Voyagers (past our solar system now) that they did that with.
Both of them did by a lot. IIRC their expected life was 90 days. Both lasted years and as you pointed out one (Opportunity) is still working.