And what would you know about Poland, seeing as you don't live here and have no idea about what's actually going on at the minute?
I would say that it clearly fits into the "other categories" as mentioned in the relevant law.
Why the smarmy arrogance pal? I have navigated it before many times and will do so again eventually despite it being full of people with smug attitudes like yourself.
He's got the classic "I left Poland yet I still believe I know best about everything in Poland" - despite the fact that their information is often years out of date.
The best answer I can give you is that while there's no specific provision for retirement to Poland, there's nothing preventing it, either. And yes, you're right about permanent residency - should be nothing preventing the acquisition of it after the relevant time period has lapsed.