It’s obvious everyone feels strongly about how they process their meat, which is probably the most important thing I took from this thread. It makes sense, we should take pride in what and how we do it.
I personally changed from beef fat to 10% bacon for burger, 20-30% pork back fat for sausages a couple years ago and my family has been happy with it - this has been what I have focused on most, making my wife and kids love eating it as much as I do. I’m always open to trying new stuff, however, so I’ve enjoyed reading how everyone else does it.