Every time everybody else is saying carburetor, I almost always start with the ignition. We have lost touch with these things in our joint consciousness. The fact is you could have adjusted the points yesterday and they are still suspect today. Often times the screw holding the adjustment is not tight enough and it slips. Or grease was not put on the rubbing block and they wear prematurely. If you don't have a broken valve head bouncing around inside the cylinder then I think it's ignition.
Many things will cause poor running and then eventually not running. But the ignition can go all at once more often than a lot of other things.
I never heard of the wind blowing my hair type compression test?