LDraw.org allows third party part in the LDraw Parts Library

[Philippe Hurbain]

Is there a difference between the Sbrick-exclusive parts and the Cobi-exclusive parts? Or is there no difference and that's why Sbrick still isn't in PT?

S-Brick IS on PT: https://www.ldraw.org/cgi-bin/ptdetail.c...032c01.dat and https://www.ldraw.org/cgi-bin/ptdetail.c...032c02.dat (BuWizz is available too: https://www.ldraw.org/cgi-bin/ptdetail.c...001c01.dat)

If it was in a private library, can that library be passed along and loaded automatically when viewing an LDraw model?

Sure. Most LDraw tools can be configured to use several different libraries.

But why use a private library for publicly available toys? Cobi was chosen by Boeing, a company that makes more profit than Lego makes revenue, to produce its toy brick planes!

I won't enter into political/philosophical discussions