"Can" is doing a lot of work here. I finally got around to playing with Lightning recently, my sense was it's quite a ways away from being ready unless you've got a decent amount of frequent income + spending going through btc. The worst part is it seems poisoned by nodes that want to extract a %-amount fee rather than a flat or bytes-dependent fee. It was actually one US penny more expensive to send a ~$50 lightning transaction via ACINQ (a recommended node that would actually accept opening up a channel) than just sending a normal blockchain transaction, where recently you can pay the minimum 1 sat/byte and get confirmed in not too long.
Lightning has promise but the regular chain is still just fine for many use cases especially for normal people, barring those rare periods of exceptionally high transaction fees. A transaction will typically show up in the mempool "instantly" and for many vendors that's good enough; much like the classic written checks system they can trust the purchaser isn't going to try any funny business before the transaction is fully confirmed/settled and you can let them go on their way with their groceries or coffee or whatever. If they do try something (successfully), well, you're out a small amount (maybe, an intermediary like bitpay may tank those for you), and you ban them from your business. For many other types of transactions, even waiting for at least one transaction but not expecting that for 24 hours from now is fine and impacts nothing. My hope is the effective minimum of 1 sat/byte will be decreased because right now it's 9 cents to send the median sized 224 byte transaction and if btc doubles again to $80k USD then the minimum fee doubles to 18 cents without anything changing, that's like an extra pack of ramen. Well it's still not that bad, especially since it's not amount-dependent; my whole state recently mandated grocery stores start charging 8 cents per plastic bag when they used to be free, many people are just personally tanking it and still throwing them out, but everyone would rather pay no fees if they could.
Lightning has promise but the regular chain is still just fine for many use cases especially for normal people, barring those rare periods of exceptionally high transaction fees. A transaction will typically show up in the mempool "instantly" and for many vendors that's good enough; much like the classic written checks system they can trust the purchaser isn't going to try any funny business before the transaction is fully confirmed/settled and you can let them go on their way with their groceries or coffee or whatever. If they do try something (successfully), well, you're out a small amount (maybe, an intermediary like bitpay may tank those for you), and you ban them from your business. For many other types of transactions, even waiting for at least one transaction but not expecting that for 24 hours from now is fine and impacts nothing. My hope is the effective minimum of 1 sat/byte will be decreased because right now it's 9 cents to send the median sized 224 byte transaction and if btc doubles again to $80k USD then the minimum fee doubles to 18 cents without anything changing, that's like an extra pack of ramen. Well it's still not that bad, especially since it's not amount-dependent; my whole state recently mandated grocery stores start charging 8 cents per plastic bag when they used to be free, many people are just personally tanking it and still throwing them out, but everyone would rather pay no fees if they could.