Well the rest of nvidias product range hasn't been released yet. Once there's a 2060, 2050 ti and a 2050, they will no longer be too expensive.
If the 2080 was £500 then loads would buy it and Nvidia would have a manopoly which isn't good for anyone.
I've looked at both sides of the argument and the extortionate prices of the RX cards will result in a better situation overall, in my opinion.
£500 is way too much for a 2080. Turing really is a terrible chip.