Does Ethereum have no other choice but to embrace L2s and scaling solutions or to die out?

I don't really understand how all this works, nor will I really claim to. Vitalik himself has stated that it's going to keep getting more and more complex. I've done some research on the whole Eth 2.0 thing but I'm hoping someone here could explain to me exactly how it works and what it means for Ethereum.

I'm posting this for the sake of discussion and my question is this. Will Ethereum ever reach a point where it will be unusable on it's own? Will we have to rely on L2s like Polygon exclusively? And yes I know Polygon is not a layer 2 but they are releasing multiple ZK scaling solutions thus effectively making it a layer 2.

I personally believe so, even though I am in-fact not the most educated on these kinds of things which is exactly why I'm posting this. Regardless, my personal opinion is that Ethereum IS going to eventually have to reply on L2s. Maxis might hate this but I personally have no problem with it. I feel like Ethereum has it's own incredible ecosystem and has bought us a ton of incredible ecosystems on other chains such as my Polygon example.

Very curious to hear what the Ethereum crowd has to say and feels about all this. Thank you in advance for your input.