Lightning simply for payments is currently not happening, everyone prefers to use onchain. But it will happen for something else, another form of utility for users.
As part of everyone, I confess that it's been a long time since I made an on-chain transaction for purchasing something. I only purchase lightning-ly. So, I question your statement. I'd actually say that lots are already using the lightning network for payments, even if it doesn't cost
that much to pay on-chain. It's cheaper, faster and more convenient.