Discussion about L2 solutions

Hi all, I'm recent lurker and long time observer of the crypto environment and I would like you guys to give me your 2 cents on something that is bothering me ???? If L2 Solutions become the standard practice and ethereum becomes the base layer or if u wish it becomes the foundation to support all the newer infrastructure, what will happen to ETH? My guess is that it will stil be used for transaction on the main net and for staking but it won't have much use case other than that..the price should follow this downward trend? One could argue that the success of L 2S automatically means success For ETH (and so increase in price), is this the case? Thank you for your time and eventual replies! Cheers!