I reckon a fair number of us rarely play our creations standing up so maybe no need for strap buttons at all?

Have to agree about strap locks as they are on every guitar & bass in the house. Need to watch out where you buy them, particularly on eBay as they might look the same but not necessarily interchangeable. What I mean is one strap setup may not want to attach to the strap buttons on another guitar and vice versa.