That's very interesting to read. The primary argument for Germany's sale of its ex-East German Migs to Poland in 2004 was the growing difficulty of acquiring spares and conducting maintenance. If NATO ally Poland could've provided those services however, I don't quite understand what spoke against letting the birds live out their service lives in the Luftwaffe. Particularly considering the fact they were highly sought after as aggressors.
I mean, some of those Migs pictured here could be the very same airframes delivered to the GDR in the late 80s, inherited by the FGR in 1990 and passed to Poland 14 years later. According to planespotters.net there are still some of them flying. As are way older aircraft in both Germany and Poland.