Absolute rubbish !
You know this is the same kind of crap that comes up all the time from people who simply hate or fear anything that's better or superior to what they like...not talking about you nigelh, but whoever the dingbats were who make up crap like that to begin with...probably upset brand snob Porker owners who've paid nearly 400k for a range topping 911 and are scared to encounter an R35 on the road
The 'inspection interval' for the 'ceramic plasma' bore coating is at every 100,000km...
As for relining costs if and when required, Kabel has answered that one already - if your the type of person who buys a 150k or 350k vehicle and expect to never have to pay to keep it going when specialised items require it, somethings wrong with that person