ELI5 How exactly are the high Gas fees issue going to be resolved?

I've been reading and learning about Eth, gas fees and the different solutions for the rapidly increasing fees.

I've wondered for a while, what will happen when ETH reaches a popularity level where Gas fees are incredibly high and unaffordable? I've read different solutions, but not being the most crypto savvy person, I fail to understand how these solutions differ from current practices, and how exactly one takes advantage of them.

I basically understand the proposed solutions include using Eth 2.0, Polygon or Matic (i think that's it?), but i can't wrap my head around how to use those, and if it's a whole new contract creation method that needs more apps to use it so that it becomes relevant and mainstream.

Any explanation for someone like me would be appreciated, if possible. Thank you!