With a PoD at any point after the establishment of
New Netherland, have the Dutch maintain control of it until at least 1750. Bonus points if they retain control post-1800 and/or if New Netherland gains independence and keeps it.
How does New Netherland's survival affect the development of the area?
EDIT: Edited for clarity.
I have an idea for a TL where the Dutch don't invade New Sweden and instead focus of strengthening the New Netherlands, preventing them from being taken in 1664. While the Dutch did get it back briefly in 1674, I figured that if it hadn't ever been under English management they probably wouldn't want it.
So let's say the New Netherlands stays Dutch through at least the 1680s. OTL, the next war that the English and the Dutch fought would be in 1780 - basically as a part of the American Revolution.
But here, the Dutch still have the New Netherlands. They might even later buy or take New Sweden (or the British will). Either way, there's a strongly rivalry in North America and probably back home. I think it's pretty inevitable that the English colonies will eventually conquer the New Netherlands, simply by sheer force of numbers - and considered that the Netherlands has a much smaller population base to work with, and were in general somewhat less willing to run completely roughshod over the natives, it's hard to imagine the New Netherlands developing as quickly as New England, Pennsylvania, and Virginia.
When does the tipping point finally occur? My money is not much after 1700 at the latest. OTL, there's over a quarter million people in the English colonies by 1700. Without the New Netherlands, it's probably a little smaller (or maybe larger, even? Who knows). But still a lot of people. New Netherlands OTL by that time is estimated at around 20,000.
Making it as far as 1750 seem pretty impossible without some external factors (mass importation of German peasants to New Netherlands? Some strange force keeps the English from taking it in another Anglo-Dutch War?)