Instruments and sounds

Hi,

Do you get all these with Halion Sonic 3 or Halion 6?

https://www.steinberg.net/en/products/vst/halion_and_halion_sonic/instruments_and_effects.html

Also, what happens to all my current sounds and Halion Sonic SE2?

Are they backwards compatible? …and with Cubase 7, 8 & 9?

Thanks,
Darren