Here's the inside story of why Microsoft bought Minecraft
You may recall that somebody using Minecraft built an 'actual' Hard Disk Drive using millions of those silly blocks. Others have built fully functional CPUs and so on, using the same silly blocks.
The technical folks at Microsoft having heard about these accomplishments got somewhat confused, and they somehow assumed that this meant that HDDs and CPUs could now be virtualized. They schemed to cut Intel, AMD, Seagate and other hardware manufacturers out of the PC market. All their hardware will be replaced with virtual hardware built up from those silly Minecraft blocks, trillions of them per fully-virtualized PC. All PC hardware will be replaced by virtual Minecraft blocks, rented by Microsoft.
Somebody from the HR section happened to be walking by the conference room and overheard their nefarious plans. The HR drone stuck their head in and asked if the virtualized PC would need to be run on actual hardware.
The MS Brain Trust replied nearly in perfect unison, "No, we plan to use recursion. It'll be software all the way down!"