This is of course not including the yearly Unity subscription, where Unity Pro costs $2,040 per seat (although they may have Enterprise pricing)
Absolutely ridiculous. Many Unity devs are saying they're switching engines on social media.
Yeah yeah, that's exactly the point.
With your own example, the bank can't just come one day and say "btw, the house you bought 10 years ago? Yeah, we just decided that it's price is now double, so you owe us for the 10 years you paid half of what you should"