Approximate hit rate:
Takers to my CQ 20%
Those able to converse on CW 30%
Those experienced CW operators sharing interests with me 10%
Consequently, the probability I could meet, when calling CQ, a good CW operator with the same interest is 0.6%.
I am afraid this probability is continuously decreasing now.
The observation stated above is just based on my personal experience. Only an objective finding. No real statistics.
The ham world is still undergoing a drastic change now. No complaint. Just accepting it.