The recommended fee is 4 satoshi per byte which is not too much in my opinion.
It's not too much, but it sounds too low if you ask me. I doubt your transaction would get a high priority if you used such fees. Maybe it was like that when you wrote that post, but not now.
I don't know if you consider Bitcoin as real Bitcoin on other chains except for lightning. Some people even think the lightning network Bitcoin is not real.
It's not real Bitcoin. It's a token pegged to the value of bitcoin. For example, if you transfer BTC over the BSC chain and out of Binance, the exchange gets to keep your real BTC and you transfer an altcoin. Lightning Network doesn't help much in a situation where I need to create a new channel to someone/someplace because I still need to make an on-chain funding transaction. And it's on-chain where the congestion is. Same thing when I want to close my channel and get control of my coins.