Crypto-systems that still work with OSCam-Emu

Which channels and which crypto systems still work with oscam-emu?

1. powervu: many channels
2. biss: many channels
3. director / tandberg: arena sports @ 1.9E
4. viaccess: ant1 europe @ 9E
5: irdeto: bulsatcom @39E

6. nagravision: some terrestrial channels only ????

7. drecrypt: none --> code can be removed ???
8. videoguard / n d s: none --> code can be removed ???
9. cryptoworks: none --> code can be removed ???

Am I right about 6?

Are 7, 8, 9 completely useless now and can be removed?

I need feedback from around the world.