Everything works fine so far - just poking around in my fresh install of Core 16..... what's this about?? I selected 3rd party drivers on install, since I have Broadcom wifi not familiar with kernel taints.
$ dmesg | grep wl
17.076301] wl: loading out-of-tree module taints kernel.
[ 17.076311] wl: module license 'MIXED/Proprietary' taints kernel.
[ 17.079753] wl: module verification failed: signature and/or required key missing - tainting kernel
[ 17.082574] wl 0000:02:00.0: enabling device (0100 -> 0102)
[ 17.269001] wlan0: Broadcom BCM4727 802.11 Hybrid Wireless Controller 18.104.22.1681 (r587334)
[ 17.474856] wl 0000:02:00.0 wlp2s0: renamed from wlan0