I was having major Wifi issues with my 2016 MBP so after trying everything I could find on the internet to resolve the issues I decided to just reinstall the OS. I didn't just reinstall over the existing installation (which I had tried before and didn't resolve my issues)...I deleted the partition and did a clean install and reinstalled everything. Thankfully that seemed to fix my wifi problems. Now here's the weird part... If I go into my wireless network preferences I see all of the old access points that I joined years ago and haven't accessed in ages. So does Apple store these in the cloud or the recovery partition or how is that possible?