A few things to unpack.
1) The Grid mechanic wasn't continued into 6th edition, although a couple references to Grids did make it in. They're not a thing anymore, and the hotfix has scrubbed the references to them. For example, the Transcend Grid complex form has been deleted entirely.
2) Pretty much everyone's in AR whenever they're awake. Those holographic advertisements that pop up in your vision? That's AR. The holographic overlay you put on your hair so everyone sees you with neon pink instead of your natural color? That's AR. If you have access to a hard copy of the No Future sourcebook, it comes in a spiffy sleeve that shows you what AR looks like, and what the drab dreary real world looks like without AR

Of the non-technomancer population, only luddites who don't carry a commlink of any sort wouldn't be in AR.
3) Technomancers don't NEED the skinlink to hack devices. Everything's got a wireless signal, and by default Technomancers can hack the same stuff without touching it the same way Deckers do via cyberdecks.