VADP and long term access

As users of EMC Legato Networker we are still using classical host backup with NetWorker Virtual Edition Client - VCB clearly had too many restrictions to be attractive for us.

VADP sounds promising, but will we be able to recover data many years later, when VMWare will have desupported VADP and rolled out XVADP or whatever?

Would an admin that has VCB backups on tapes be able to recover them on vCenter 5.0 hosts?

Thanks for sharing your opinion on this.

Regards, Tom