I think with the upswing in hot sauces, sriracha, ghost peppers, farmers are growing
hotter and hotter chilies. It's good that you ended up with medium/actually mild because you can always add heat to that dish now, but not the other way around if they were super hot to start with. I remember when my grocery store had Tabasco, Crystal and Frank's hot sauce. THAT WAS IT. Now there must be 6 linear feet of hot sauces.
I always add diced green chilies to my guacamole...get the whole ones in the can and rinse them well. Takes me back to ABQ.