Originally Posted by
master991
So in case of Poland, if you surround your Polish passport but do not renounce your Polish citizenship then you risk being denied permission to leave Poland without valid Polish passport if you are determined to be Polish citizen by Polish Border Control.
In future, it may be more difficult to travel to EU as EU-dual citizen if ETIAS enters into force in 2020. Just like on the US ESTA application, they may ask you to disclose all citizenships you have. If you are EU national, they may deny you travel authorization and require you to use EU passport.
I don't really understand what you are trying to say. Polish citizens are not required to use Polish passports to enter or leave the country, if they have some other citizenship/passport. You seem to apply the US rules to Poland.
Same goes for the second paragraph.