I live in Washington state and I’m pretty certain the sales tax here is 10% (slightly higher than your maximum figure of 9.56%). It’s a pretty well known trick here that you can account for tax just by decimal shifting and adding (ex: 5.29$ without would be 5.29$ + 0.529$ ~= 5.81$ with tax). Is that 9.56% an “in practice” figure that accounts for rounding down? I’m curious where you read it.

The thing that finally got businesses to finally get off IE wasn’t from the browser being worse than every other option. Heck, it wasn’t even because it was a decrepit piece of software that lost it’s former market dominance (and if anything businesses see that as a positive, not a negative).

What finally did that was microsoft saying there won’t be any security updates. That’s what finally got them off their ass; subtly threatening them with data breaches, exploits, etc. if they continue to use it. I don’t see google doing this anytime soon, at least not without a “sequel” like microsoft had with edge.