As they created the white gold 5168 and other complications in Aquanaut in precious metals . The only Patek steel chronograph is the aquanaut avbl and no other exists in production . Next in line will be the aquanaut chronograph and probably 5167 for sure . It’s all about making money 💰 and they want the lion share fairly . Flippers & buyers have enjoyed the surge in prices and manufacturers besides popularity have not enjoyed the similar margins . It hurts them and they can’t reprice a ref overnight in double digits however kill it bring it in new metal and set a new price and after few years reintroduce it with a much much higher price point in steel again ..