I had no idea that the vst functionality had to be removed, so I was
wondering why Sonar couldn't see it! Its just as easy to render a csd
as a wav and then load it as a track into Sonar on windows or Ardour
on Linux. I'm getting more into writing scores in Rosegarden with my
synth, and then converting it into a score file and use that to drive
something in csound, which then renders into a wav file that I load
into ardour, then I can record acoustic instruments with it, or
process with jackrack.

Ladspa seems to be mostly for processing audio. I believe there's a
group working on a VST like standard for virtual instruments that
would be open source. Vst is great, but the music world really needs
Steinberger to  LGPL it.