[SteveH]

as for our friends in poland, how certain can we be that poland will stay in the EU given its catholic heritage and antipathy towards muslims? and what of the judicial conflict with the EU courts potentially leading to a defacto polexit?

https://www.forbes.com/sites/joharper/2018/11/15/polexit-creeps-into-eus-rear-view-mirror/#77e7da3e7c79

are things always static or is it more accurate to view politics as bodies in motion?

[Berlin_Freeper]

Seems to me most of the article you linked to indicates Poland will not leave the EU.

For example:
Thirdly, both Polish society and government share a strong support for EU membership. Over 65 percent of respondents in Poland oppose the idea of their country leaving the EU, with about 17 percent of the opposite view.

[Cronos]

Poland and Hungary are staying in the EU - from a people's point of view, well over 60% of each country's population wishes to stay and most politicos do as well.

But they are following the policy of shifting EU policy from within. The sickening part of Brexit is that until 2016 the UK was their biggest ally to push agianst the Franco-German axis.

The UK had more clout within than it will have without