It's not implausible that changes in technology and life/work habits will ultimately make currently highly-attractive areas less so. And once population starts

It's not implausible that changes in technology and life/work habits will ultimately make currently highly-attractive areas less so. And once population starts to fall in combination with minimal wage growth it's hard to see what would sustain current high prices. Ultimately it seems the primary driver behind property prices is the willingness of buyers to take on debt and for banks to issue it. If house prices did start to plateau/drop off over a sustained period with no obvious indicators of future growth then that willingness (particularly on behalf of banks) may well drop off pretty quickly too.