There are some NON EU countries that can use egates in Paris, so I guess if you are from one of those, you wouldnt be stamped there either.
Also in my last trips to the US with my mexican passport (non biometric), I haven’t been stamped
Arrived into Zurich this morning and used the e gates, it was so good to have it back 
I also received no stamp on my British passport when I flew back from the US or Asia back to Europe via German cities…Presume with the resident card you will not necessarily need to be stamped but some boarder might not check it so carefully. The resident card allows you to stay longer than 90 days. It is my understanding…
BTW, a couple of my friends also had no stamp when they travelled back. One is from South America and his wife came from China. So presume it is more related to if you have a B permit or above.