Thank you for that detailed response and sharing your knowledge of how things work in Europe. I’m moving overseas in 2024 but not to Europe and I’m retiring so I won’t need this but I’m always curious how neoliberalism operates in other countries. With corporations having the upper hand these days and the housing crisis all over the world I would not want to be in the OP’s shoes. I hope, as you say, that they have misunderstood the notice they received.
Cambodia has some good deals with their retirement visa. Cheap and allows you to buy land and work somewhat. I might end up there if Vietnam doesn’t work out.