Yeah its crazy. I remember preordering games like Detroit, The Last of Us 2 and Uncharted 4 for about £41-48. PS3 games were even lower range than that, from as low as £37! And now PS5 games (so far) has gone up to 50% from PS4. Way too much of a jump imo. But yeah I too try stick to £20's for games too for newish releases I'm not dying to play.
Picked up Spiderman Miles Morales for £21 on Ebay in Feb so games will drop. I have a huge backlog and WoW to play so its no big waiting a few months for a substantial price cut.