In 2012 PCs (only PCs, not network appliances, not data centers, not phones...) were estimated at 1.5% of global electricity use, so you're off by a good margin

In 2012 PCs (only PCs, not network appliances, not data centers, not phones...) were estimated at 1.5% of global electricity use, so you're off by a good margin. And that is deeefinitely not negligible, nor is the need (and eco impact) to buy newer computers because a 2016 MacBook Pro is unusable when your work requires 4/5 electron apps side by side.