I dunno really, but if implemented it would set Bitcoin as the main arbiter in stone...90% + in dominance.? Maybe.?
Not gonna happen any time soon, Maybe never

They wanted to increase the block size by 250KB and when they tried to do it, Someone with a significant amount of hash power forked bitcoin, Developers now are cautious, They think if they try to implement LN, Everyone leave BTC and fork a new one. If fees stay small, miners will mine empty blocks, If you were transferring fiat with bitcoin network you could argue about high fees, For someone trying to transfer a million bucks $3 is nothing.
Miners have no incentive to mine empty blocks. Small fees still make a nice profit if there are more users, which LN is what it is all about. Scaling.
Mining is a self-correcting mechanism. There were miners when fees were smaller and there wasn't enough transactions, now there is more transactions so there will be more miners. Either way, no one is really worried about miners leaving Bitcoin, there will always be someone to mine it. Anyone who sees the value in Bitcoin will mine it, they would earn profit, even from small fees, if they didn't, then fees would increase and so on.