This is, without a hint of irony, one of the absolute best pieces of server marketing we have ever been a part of. It still delights me a decade later.
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The Erasure Encoding that was at the heart of Home Server is used by the entire industry now. If you have data in the cloud, chances are very high it's protected by that bit of research that came to market in WHS first. RAID was on life support long ago.
RAID is just a special case of Erasure Coding; some EC profiles in use are actually equivalent to RAID. The bigger win IMO is the intelligent sharding and recovery of data chunks across large clusters (or pools of disks). EC by itself is really just a fancier RAID level.
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Really the math behind all of this is ancient; we've just figured out better ways to apply it than the old "one disk, one filesystem" model that RAID piggybacked on.
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LRC is a very special case. Having locality for recovery operations is what makes modern coding so critical to cloud ops. Reed-Solomon hit the wall years ago because it didn't solve locality, thus, speed.
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