Anecdotally, the most reliable Macs I've owned have been the new ones.
The least reliable Mac I've ever had was a 17" PowerBook. I got more than my money's worth out of AppleCare with that one.
Ordinarily, I'd go off about cheap Chinese build quality, but the Chinese will build to any spec and quality you are willing to pay for. Also, according to Coconut Identity, the machine was built in Ireland.
That's because they're not old enough yet to develop problems. Reliability can only be determined after some time has passed.
2015 iMac
2014 MacBook
2011 MacBook Air
2009 MacBook
2005 iBook
2005 PowerBook
Plus an iLamp I can't properly estimate the year on. All chugging along. Let me know when to expect my MTBF.
That's not how it works. MTBF is a statistical thing it doesn't say anything about a particular device. Just like smoking can give you lungcancer and your 95 year old uncle smoking 3 packs a day is not evidence to the contrary.
Cost 6k and made in the USA.
I hate it with the intensity of a thousand suns. It is absolute trash (and we bought two :( Even worse than the v1 MacBook Air I stupidly bought.
The best Mac I owned was some old iMac 24” that lasted something like 7 years. We kept passing it down the family until the screen resolution wasn’t good enough anymore.
(I’m sure it will break the second I get home now that I said this)