Lightning is for merchants.

If its a rather large sale like a car, a few conf onchain TX sounds fine. The buyer should pay a higher fee too.

2bithits

It really depends on the good/service we are referring to...for example for an online purchase of a few hundreds dollars it could be fine using an onchain tx. Same for otger goods like houses, cars, expensive stuff.

For sure nobody is going to pay with an onchain tx for a coffee  :-)

tolot

bitcoin

Something I was curious about was how merchants that want to receive BTC onchain can protect themselves from failed or extremely delayed transactions. 

Everyone knows that with Lightning, the payment settles instantly. But how should a merchant approach onchain BTC? It can take a long ass time to hit six confirmations and it wouldn't feel right to make a customer wait until it settles (or fails)! TIA