The 3850 is not EOL at this time. You can look at all EOL notices for the 3850 here:
Usually we will publish an EOL notice a couple years ahead of time to give you time to migrate to a supported platfrom before the actual EOL date. There is not even an EOL notice for the platform out yet. Just certain versions of software.
Hope that helps!
Neither switch has EOL or EOS announced. But IOS XE 16.3.X is EOL
3850 Series is not EOL.
To avoid any confusion over EOL dates please use below link to check