As the name says, Spline Select modifier doesn’t have soft-selection. This is really bad because multiple Edit Spline modifiers has a long standing bug, it doesn’t send the soft-selection data to modifiers.

I can’t count how many times I had to add a Turn to Mesh or Mesh Select modifier to convert a line to mesh just to have soft selection. This not only isn’t a flawless workaround but makes everything a lot slower than necessary.

Regards,
Jr.