I think L2 has many more uses than just reducing fees. For example, decentralized exchanges, NFTs, games, and many things that are not considered transactions should be there. Here, the fees will be constantly low with the possibility of being able to be scalable in unnecessary directions.
Or we can rather say that they are an alternative because they don't reduce the fees for the other coins but it was them that has a cheaper fee. Not just there is a 'possibility' of them being scalable but they are really scalable. This is one of their advantages.
Ethereum bought or will buy Polygon in the nearest future
I think no. Polygon or POL now must still be owned by the same team but may be yeah that they might be getting a buy offer because they are one of the best performing cryptos in this market and one of it might be ETH. I don't only think that POL will agree to it because like I said earlier, they are already doing well and are earning a great income. They can also earn more passive profits if they still have their project, than if they sell it and get one-time big-time amounts.
Anyway, my thoughts about Polygon is that it's great that they are continuing on improving their service to the public. This should give them another positive impression and can make their price rise more. I didn't really pay attention to what their update is all about but even if I do, I think I won't still understand it lol. The only thing that I can say is that it must be one of a kind that it leads them to change their name.