The delivery solution reminds me of the why-dropbox question. Delivery is fine* if you know exactly the amount you need or are fine with paying for extra materials. There were a few times I needed an extra piece or just needed something else.

And yea, I can still just wait for another piece of wood to be delivered - or I could just ask someone who has a truck to help me.

*Also Home Depot / Lowes lumber is garbage tier. I don't trust them to just send me whatever 2x6s I select online. If you don't go to the store and actually inspect the wood, you're just gonna get curved pieces.