Yeah, there's any number of sling types being pushed and used nowadays.
I work with & without slings, and my former agency is still using an adjustable 2-pt sling for rifles & shotguns.
The single point slings may offer transitioning from one side to the other, but that's about it. I like how the 2-pt slings give better options for getting the slung weapon out of the way under different situations.
It doesn't have to be fancy.