I prefer rabbet or mortise and tenon over butt.
Butts are very weak and tend to fail far too often.
However I have found that using biscuits or dowels do strengthen the butt quite a lot. For some things butt is OK.
But I didn't become a master carpenter by taking half measures (measure twice, cut once), So I have a dovetailer jig and finger jointer jig which I use more often than simple butting.
I currently do not have any pictures of joinery on my computer, so sorry I can't show you pictures of my work.