I have never heard of compatibility or corrosion problems with all-metal radiators, but it is getting harder to find them. When my '91 Volvo plastic radiator failed after 8 years, I found a metal radiator for it and it has been fine since. However, I notice now that no one sells a metal radiator for that car. Only plastic/aluminum is available.
I have a couple of '97 BMWs that go through plastic radiators on a regular basis. I can get 100% aluminum ‘high performance’ radiators for them ($$$), but I have looked in vain for brass radiators to fit them.