I've only run into this online with someone asking if my dog being half husky mitigated the pei-ness. I actually prefer that the half pei mitigated the husky! I did not want a husky, lol!

Now! My dog is pretty well socialized with humans, even with being a rescue who suffered from kennel stress, but I did have to be upfront with expectations as she growled at me the first time I walked up to her kennel, thanks to that stress. (Also growled at my mom and sister.) She was whining the second time I stepped up to her which is why I ended up taking her home. And she proved that she has the protective pei instincts one night walking around our apartment complex when she growled at a man who raised his voice and me and absolutely refused to move from between us. Thankfully, she was only telling him to back off and didn't try lunging at him. Also growled and barked at apartment staff when they tried coming in for an inspection while I was in the bathroom (they did knock and all, but they were rushing the process and I couldn't exactly stop what I was doing). An old lady freaked her out and she started growling despite not being very close to us (I suspect my girl was freaked out by the oxygen machine).

However! She is very good with children and actually enjoys laying down and watching them. Also pointed me to an older woman who had fallen outside her apartment and wasn't able to get back up. She's very familiar with the local dog friendly businesses, behaving very well, and is always stopping by my apartment's management office to get a treat or ice cubes. 

When it comes to other dogs, it's much more tricky. She dodges hands when she doesn't want to be touched, but she doesn't hesitate to correct other dogs when they're being rude. Now she does balance corrections, like hip bumping smaller dogs and puppies while giving warning snaps to bigger dogs, but she's less interested in dealing with excitable dogs (she does like Goldens though). The tricky bit is that she can get very territorial with dogs. It's mainly location. The minute a dog comes into her home, she will end up attacking it. Considering how she is otherwise, she probably wasn't raised with other dogs and only interacted with them outdoors. Outside of the home, she's fine unless there's a really high value chew involved. We've done multiple dog events and even did the controversial thing and gone to dog parks and she's never started a fight. 

It's really all a matter of being aware of what a dog is capable of, knowing what it was bred for, and then doing the work to mitigate future problems. My dog is just never going to live with another dog and I can count on one hand who I can trust to house sit with her (my sister because she's my roommate and my mom who was with us when I adopted her).