I found a stupid workaround for your problem with OBJ export Exporting Curves to Maya - #3 by BOBtheROSS
OBJ : Blender → Maya
ABC: Maya → Blender
NURBS should have no problem in these formats
Bezier curves are different in that Blender has 2 handles for the first and last control point, but Maya has only one handle for each of those. So these need to be added/removed in Blender before converting to a Bezier again. Also Maya doesn’t have a simple checkbox like Blender for NURBS to act like a Bezier, there comes my rebuild workaround into play.