I wonder when it'll shift that people that can do remote work move to these towns specifically for the lower cost of living.

In my circle of friends who do usually work remote, there are a few that want to move to more rural areas. The number one concern is availability of broadband, which is just terrible in Germany. Further down is friends/family not being close and possibly sticking out very much. I don't think remoteness is an actual issue (because there really isn't remoteness anywhere in Germany, it's very densely populated, and saving a lot on rent & co might well offset the cost for a few hours of driving every other weekend to meet friends.