And then boom, all your services are gone due to a pesky capacitor on the motherboard. Also good luck trying to change even one software component of that monolith without disrupting and jeopardizing the whole operation.
While it is a useful advice to some people in certain conditions, it should be taken with a grain of salt.
That capacitor thing hasn't been true since the 90's.
Hardware still fails. It isn't a question of "if", it's a question of "when". Nothing lasts forever, the naivety lasts only so long too.
Obviously. But you get duplicate hardware,
set up HA, get vendor support contracts, use multiple colors in disparit location. Cloud providers have figured this out fairly well, as we all did in the aughts. (Well, some of us anyway.) You can definitely determine that's a bunch of really annoying work and just pay a cloud provider to deal with it, or not, and go your own way. But if you want to be credible when saying that hardware fails, maybe people shouldn't use a problem from three decades ago as their example and use anything more recent?