Both my Scarp 2 and Moment DW flys can be pitched W/O the inner tent. Most newer double wall tents these days can do this.
The fly makes a fast-to-pitch "tarp" that is usually quite wind-worthy. Yeah, most require that you carry a pole or two but some, like the TT Stratospire 1 & 2 only need your hiking poles.
So why buy a tarp when your tent fly will do?

