Timing chains, fuel pumps , coked up valves , and electrical gremlins are the worst things to put up with but the 1.6 petrol unit isn't the most reliable on the planet and things can need replacing at quite low miles,
My first one had valve issues at less than 30k and my current one had a new timing chain at 30k and I've currently got clutch squeal which means probably a clutch replacement at 35k miles and its only 5 years old.
Having said all that if they still made them I would be straight down the dealership to order my 4th RCZ.
My current one is a 2015 model so not many around newer so this one will be my last and I will really miss it as I've been driving these French {or Austrian to be precise} beauties for 6 of the last 10 years.