Most have been just lots of volume, outboard powered inside trailer-able limits.
That is what the market calls for. Majority of production (90%+) for the major players in the Polish boating industry is either sold outside of the country or to the charter fleets. Most boats are available (option) with an inboard or keel (mostly export), but for lake sailing it is just not required. End users (or people that charter the boats for a week or weekend few times during the summer) want a nice, roomy boats with fridge, TV, heat, shore power, standing height - you name it. The industry responds and for the major charter fleet players the fleet is never older than a few years. People don't want to charter old boats and the demographics is little different than what I see in my area. Lots of young people. No keels or inboards reflect the area where the boats are used, as it is very common to stay for the night on a nice shore with the transom at ankle depth.
This movie below, while older, very well shows a small portion of the Masurian Lake District. There is no room what what you like, unfortunately. See how many "classic looking" boats will you spot.
The large ocean going market is already dominated and it is hard to get the slice of the pie and being a manufacturer (and investor), get a reasonable return on investment. I think only Delphia is doing well in that regard (sail wise) - you want Polish-build power and luxury? Money is not an issue? No problem!
http://galeon.pl/en/yachts/ or
http://www.sunreef-yachts.com/en/sailing-yachts The midrange market, well, we all know the players there. So overall, I think the sub 10m long market segment (manufacturing) is very strong and will remain strong.
Now, back to inverted bows..... ;-)