[Ekaros]

On other hand I think mandating upgrades every time code changes for everything would be unsustainable. From many perspectives like supply of labour and materials. And fact that creating such uneven demand would cause very messy labour market.

Mandating ripping out immediately everything dangerous or carcinogenic, would be even bigger issue. And these things don't cause actually so many issues to be very life threatening. They have been around for decades after all.