Hyundai's New Spark Plug Safeguards The Future Of The Combustion Engine

I'm on my fourth Hyundai since 2006.
.can't say enough good things about them.
K... since someone is wondering... why do you replace them every 4-5 years? I replaced my 2014 GC in 2018 with 18k miles on it on a whim and to get rid of the **** suspension issues it had that made me nuts and chrysler couldn't fix...