Peter I'm in the same situation as you. I know that when SuperGreen was introduced and the Metal Card was made into a part of that membership instead of being a stand-alone product, we have all been upgraded to SuperGreen until March 2021, because we already paid for the first year of the Metal Card product (which was called Green Card at that time). That made sense, because the Metal Card was a part of the SuperGreen membership from then on. You couldn't get it without having SuperGreen.
Now the conditions changed earlier this week. The Metal Card is no longer part of SuperGreen. It is now a card that everyone with any type of bunq subscription (except Travel) can get, as long as they either pre-pay for their subscription plan for a certain number of months (24 for the cheaper subscriptions, 12 for the more expensive ones) or by paying extra for the production (when you're a member of a Pack). From then on, the Metal Card can be used for the next 6 years of its validity without any extra costs. That's why it's now basically "free" (or, at least, no extra costs on top of the current subscription).
Therefore my conclusion is, that of course we as the early Green Card users also don't need to be on SuperGreen anymore to use our Metal Cards. Sure, we still have our rebated SuperGreen subscriptions until March 2021. But the Metal Card is no longer a part of that membership type. So yes, I'm saying that I think we can just downgrade to Premium next March and keep on using the Metal Card until its valid date (or until we lose the card somewhere).
Edit: Now, of course I think it's best to wait on official confirmation for our special case, but wouldn't it be really really weird if regular Premium users could just use their Metal Card for no extra costs for the next 6 years, but we could only do so by staying on SuperGreen? As the SuperGreen membership now not longer has any ties to the Metal Card product, I don't see any reason for why that should be required.
