So what happens when Lightening Network gets flooded with endless exchanger transactions and acceptance from more and more exchangers in the future?

I suppose we put regular Bitcoin users at ease.

Definitely LN is on chain and will get many restrictions as it grows.

Lightning is off-chain, and depending on how it grows, it probably gets less restrictions as liquidity increases.

Wouldn't that be the same case with LN in the future.

No because there cannot be Ordinals in lightning.

Also, will this ever stop like this or we need to keep forming new type of networks one after another.

Nobody can give a certain answer to this, but I'd rely on the fact that humans are developing creatures.