It will be a bit like when Beeching closed half of the railway stations/lines, the knock on effect came as a surprise in that the busy stations had a fall in numbers because travelers were not able to go to their intended destinations or start from their local stations because they were closed.
My guess is that cafe customer numbers will be reduced and either prices will be increased or opening hours reduced, both of which will further reduce visitor numbers and the downward spiral is gaining momentum. Luckily, there is still plenty of places where you can stop off for a cuppa and a bite to break your road journey without getting striped, some of them even have aircraft activity on flyable days.
If you feel the need to break your journey near to OW you could try Sandy Microlight Club, just by where you turn off the A1 for OW, I had coffee and cake there when I was early for a meeting with someone in Potton a year or two back.
Rans6............