> our predecessors spent so much time in getting everything 100% correct from the ground up

What predecessors are you talking about here? The internet is barely held together with duct tape and servers running only because of minute by minute injection of WD50 straight into the fan bearings. There is so much cruft everywhere that is being relied on daily in production systems that most people lost count by now on how much horrible code and setups they've seen in the life.