Stamp duty cliff edge approaches. What might happen?

https://www.estateagenttoday.co.uk/breaking-news/2021/2/one-in-eight-sellers-will-pull-out-if-they-miss-stamp-duty-holiday

This article seems to suggest a significant number of buyers will drop out if the deadline is missed. Given how overwhelmed the sector has become with the boom in property sales, there appears to be a significant risk of deadlines being missed.

If 12% of the market drops out, that will represent a significant number of chains collapsing.