25 yr life is very impressive!
What brand gave you that? (realizing that whatever brand that is has been cheapened up drastically since then by MBA consultants).
For most of my life, my folks lived in two houses (we moved a ton when I was young, but by the time I was seven, they'd finally settled). We had a "green monster" (big ugly green box) A/C unit that was original to the house that was built in 1968 or 1969. It was there when they moved out in 1995.
The next house they lived in was built in 1991, and the original unit is still on that house (the furnace has issues, but the A/C unit is still chugging). I couldn't tell you what either brand was.
As an aside, the rental house I'm in has a Carrier unit that was installed in about 2009. It's crap. Both the furnace and A/C unit have issues. The outside unit has a leak, and needs re-charging every 4-6 weeks when in use, and the furnace rattles something fierce when it kicks on.