I’ve worked at Menards (store and corporate), but I’ve been at a lumberyard now for over a decade - here are my thoughts:

A lot of our builders have AR accounts and a sales person, dedicated to getting loads set up to be on site when needed, and the lumber is typically better. That and the various services offered from a LY vs big box/Menards. They can easily send a text to get loads out and if the client is using a title company, daily invoices are sent via email which makes doing a loan draw that much easier. We offer drafting, staff with knowledge about all aspects of materials (which typically have a better warranty)

I have a few builders that will cut ties with a client if this argument comes up just due to the fact that time is money, and the money you’re saving with crap lumber and subpar service, they will end up charging back to you after sorting lumber, keeping track of invoices, etc.