The government allows software piracy protection. There should be a trade-off where source (with a few variables hidden for privacy / security) is escrowed and

The government allows software piracy protection. There should be a trade-off where source (with a few variables hidden for privacy / security) is escrowed and released after a certain time. Would MS share prices really drop if 20 year old programs like Windows XP and Office were forced to be open sourced? Would anyone take a major hit? The cost would be small, but the upside is the preservation of our technological history.