Our Fabia's original 12-valve motor made it to just over 175000 miles, with in all honesty a driver with very little mechanical sympathy during our ownership. I've yet to strip it down to confirm, but my impression is that it was the bottom end that wore out, and that would fit with it being driven without great care about which gear was actually appropriate at any given time.
Edit: it also had a serious clutch fault during its last months, that I was very slow to understand, which can only have hastened its demise.
Obviously if it's given good oil regularly, and not driven on too many short journeys where it doesn't get up to temperature, it will help any engine last longer.
I suspect there is a fault to be found on yours @Auxiliary; do you have VCDS? The freeware version should let you look at measuring blocks of the engine ECU where you could perhaps scrutinise the misfire counters for each cylinder and see if the numbers increase with the judders, which seems likely. I can't remember if they give you an individual cylinder breakdown of that stuff, but I suspect so?
It might be useful to see if they are random or focussed on one cylinder. (Or there aren't any at all)