The announcement means that they're closing Crucial - just like it says in the title and the first paragraph. The rest of that press release is outlining the mechanics of how that works + some fluff. Micron is going to continue producing the exact same memory chips in the exact same fabs. They're just not soldering it to a board, slapping the Crucial logo on it, and selling it directly to consumers. There's nothing stopping downstream vendors from buying Micron chips, soldering them to a board, and selling them to consumers as Micron was doing previously.

There's nothing in that press release that implies that the memory was somehow different (or "consumer-grade"). The _only_ thing they're saying is that they're ending their B2C business and focusing on B2B.

Re-read the previous comment again.

You just need an additional chip to move from "consumer grade" (ie no parity) to "server grade" (ie have parity). ECC support is actually in the memory controller which is in the CPU for the last 15 years. No magik.