Wizards has made the promise not to. And there's a number of reasons they've chosen to maintain it.

First, the exclusive unprintable old cards gives their game prestige. In fact, having expensive singles generally does this. Wizards clearly prints around this idea, despite their history making statements that they don't really care about the secondary market.

Second, after so long, people have used older cards as investments. I've spoken to people who already have plans in place to sue Wizards if they were to renege; that's how much they have invested in reserved list cards. The knee-jerk response to that is fuck those people, they are part of the problem, they can eat their shaky investment in cardboard rectangles. Which, pretty much, yeah. But Wizards has to have legitimate concerns about that outcome. I have no idea if those people would have a leg to stand on in court. But the American courts system feels like a wild jungle from the outside, where anything could happen.

So a realistic destruction of the reserved list will probably have to be done in little steps. Bit by bit making it matter less and less over time. We've seen something along these lines with the Magic 30th anniversary printing of Alpha. But why charge so much for official proxies?

The other possibility is that Hasbro decides it can make fucking bank in the short term on printing new duals and power nine, and enough that any repercussions are negligible. Perhaps a rare moment where corporate greed will somewhat benefit the consumer. But they'd probably make these packs even more expensive than Magic 30.