Montleek: Robert, is it possible that in Western Europe, the regional lects have been preserved better, while in eastern Europe are preserved worse? There was communism/socialism in Eastern Europe, therefore more tendency not to continue speaking with regional lect.
In the Netherlands, regional lects of Dutch Low Saxon, Limburgs, Dutch, Frisian, Low Dietsch and Southeast Limburgs are spoken.
Dutch is spoken in a bewildering variety of lects. There is nearly a separate lect in every village or city.
Limburgs is spoken a bit in the far south and there is a different lect in every town here too.
Dutch Low Saxon is spoken in the north and center of the country, once again as a different lect in every town. Whether this is really Macro-German or Macro-Dutch is not certain, but I would call it more Dutch than German.
Frisian is less dialectally diverse.
There are also very strange languages like Low Dietsch and Southeast Limburgs spoken in the far south. These are classification nightmares. After a lot of study, I concluded that these are neither German nor Dutch but actually something completely in between. With Southeast Limburgs and Low Dietsch, you also run into a the dialect in every town situation.
There area number of separate languages within Dutch in the Netherlands, probably over a dozen. There are three Dutch Low Saxon languages, but the situation is very confused and is almost a classification nightmare. There are probably 3-4 languages inside Frisian, though the vast majority speak the standard lect. There are probably two lects inside Limburgs. Southeast Limburgs and Low Dietsch are separate languages, though each seems to have a few languages inside of it.