Michael Ruhlman talks about compound butter as one of his “Elements of Cooking”. I use compound butters a lot, especially when I grill. For grilled corn-on-the-cob I use a basil and garlic butter. It’s also excellent on grilled lobster. A barbecue rub butter is nice on grilled asparagus.
I’ve been making butter at home and will usually split it up to make different compound butters.