Oh OK. Me too.
but Google knows best
However, my Moto G1 on 5.1 still had widget tabs. Then everyone kept talking about the Google Now launcher, especially in the blogs, like I should have it as standard and there was an improved version, so I downloaded Google Now and had been using it ever since.
If I switch back to the Motorola launcher, whatever its called, that still has widget tabs.
I think I'm right that most Samsung's do as well.
If you can switch out of Google Now that might work, idk.