I agree with you, Mike and Mario.
I understand that a new version needs time to upgrade or develop, and at first I was really surprized of the first annoucement with only a 6-months delay.
Now, it would be nice if Don would give us a periodic (quarterly?) update, with a realistic outlook for availability (or beta-testing).
“What I need is to put an extra staff only in some systems.
Do you think it will be possible in version 6?”
This has “always” been possible. Actually, the extra staff “exists” in all systems, but you can hide it where you want to (select the staves you want to hide, and press “hide staves” in the View Menu).