I work at a grocery store Starbucks kiosk which has an older model espresso machine that does not have the capability to brew blonde espresso. Whenever a customer orders a custom drink with blonde espresso I have to tell them we don't have blonde, they completely change their order to another drink. Or sometimes even leave. I have a Breville machine at home and often brew both dark and lighter roasts in milk drinks, and honestly if it's a sweet or flavored drink I can rarely tell the difference.