While all of that may be true, it's hard to see how the deletion of a website fits into that grand plan. We're talking about saving a few bucks to maintain this old information at a cost of huge waves of bad will? Seems incredibly short-sighted.
The Magic site has been running more or less for 25 years, and due to WotC being a game company rather than a web content company likely has a shit ton of tech debt. Rather than “pay down” that “debt” the right way, they’re going to “write it off” and only modernize a small fraction of their content.
Because they have zero actual intellectual investment in their business, haven’t ever played, or been involved, and thus have zero idea of how much value they’re destroying.
Not a Magic player, but this is your business, what do you think you should be doing?