Czechia seems to be an outlier according to the data I've seen (link), but granted that Estonia also has a near majority of atheist. But yeah, observance of actual religions rites are very sparse. But I really care more about how people identify as that is a powerful form if self-identification, especially post-revolution.

Re: Catholcism, I agree 100%. In that document I referenced above, the Chinese government talks about the danger of imperial influences in religions:

Buddhism, Islam, Catholicism, and Protestantism, which occupy a very important place among our national religions, are at the same time ranked among the major world religions, and all exercise extensive influence in their societies... At the present time, contacts with international religious groups are increasing, along with the expansion of our country's other international contacts, a situation which has important significance for extending our country's political influence. But at the same time there are reactionary religious groups abroad, especially the imperialistic ones such as the Vatican and Protestant Foreign-mission societies, who strive to use all possible occasions to carry on their efforts at infiltration "to return to the China mainland." Our policy is to actively develop friendly international religious contacts, but also to firmly resist infiltration by hostile foreign religious forces.

We must be vigilant and pay close attention to hostile religious forces from abroad who set up underground churches and other illegal organizations. We must act resolutely to attack those organizations that carry out destructive espionage under the guise of religion. Of course, in doing so, we must not act rashly, but rather investigate thoroughly, have irrefutable evidence at hand, choose the right moment, and execute the case in accordance with lawful procedures.

The entire document is worth reading, but this in particular was pertinent to avoiding reactionaries within religions. It still asserts that Marxism and religions are contradictory but that religion isn't going anywhere even though it's been illegal for over a a generation.

But as I mentioned to the other poster, we're basically in agreement. I just don't think that religiosity will ever just fall away like Marx & Engel's optimism, but who knows. I'd be glad to be wrong, especially if China's model of the long game in followed.