Originally Posted by uzumakinagato
And One Piece will reach 1000 chapters. During timeskip Oda said One Piece was around halfway. At that point we were at 600 chapters so for sure above 1000 chapters.
I took that with a grain of salt, he clearly meant halfway done with the plot, but it wasn't a guarantee he'd make more 600 chapters, since he could deliver the same amount of plot in less or more chapters. But you're right, the 1000 figure is expected for One Piece. With enough luck, it could beat "A Tale of Two Truncheons" in length and that manga ran for 24 years.