I haven’t really seen any data that shows wider tires roll faster than narrow tires on decent roads assuming they are both inflated to their optimal pressures (meaning wider tires at a lower pressure and narrower tires at a higher pressure just enough to give a safety margin with respect to pinch flats).

Most testing I’ve seen compares both the tires at a similar pressure which gives the wider tire higher casing tension. When coupled with testing on rollers or textured steel drums, this means the wider tire will test faster. However when normalized for that they were basically the same. Meaning the narrow tire should be faster due to aero.

Is there any new data?

Also I don’t understand the case for tubeless doesn’t assuming you’re running latex tubes and rarely gets flats. What’s the rationale for tubeless in that case