If the cash register can manage to figure out granularity in the local taxes, so can the price tag printer. Updating tags every couple years after an election might be a pain, but it isn’t exactly a herculean task - they seem to manage it in places where tax-included pricing is required.

The problem is, as you say, no one wants to be the hero: No business wants to appear more expensive than competitors, and no legislator wants to be the one to make cost of living appear even higher.

Turns out, they’re both!

Haiku. It’s a reimplementation of BeOS.

Alternatively, you could use ReactOS and make it look as windows-like as possible, and then go and post on Windows support forums with solutions to problems that work for ReactOS but not for actual Windows, and then play dumb while calling them dumb when it doesn’t work for them.

I use arch btw.