I have Platinum, plus the SSL and a few singles I've collected during sales. I haven't had any issues using Waves stuff, except for the disappearing GUI bug. I really like the quality of the plugins, even though some are starting to show their age.
I have resigned myself to upgrading my Waves bundle whenever I build a new DAW. Otherwise, I stick with the version I have. I mean, the plugins really haven't changed all that much over the years, so I don't see any need to keep them completely current all the time. It would be different if I ran a studio...
Regards,
Dan