The problem is that the retailer doesn't need to do anything to accept Apple Pay but does need to do something to support CDCVM needed for limitless transactions. If not many customers pay by Apple Pay there won't be much incentive for the merchant to update their terminals.
Thank you so much for posting this info, I've been wondering about the limit cap removal for ages. I should probably have just googled it seeing as it is a legit Apple KB article....but still!
I've just contacted my merchant account provider to see if I can enable CDCVM on my new terminal.
For this reason if a purchase is over £30 I assume they won't accept contactless but look out for the symbol on the screen.
What does the symbol look like?