Well for me I consider all road noise low-ish frequency.
Don't get me wrong, these help reduce noise, but it's just a piece of the puzzle and it's a lot of effort for what you get out of it.
Butyl on the rear wheel wells really cut out a lot of cabin noise for me, but it's on the lower end of the spectrum. The extra door gaskets would take care of the higher end with wind noise reduction. I may just try what
@MattM24 did recently and stuff backer rod (foam tubing) into the existing gaskets of his door seals, that may also further reduce air noise/provide a tighter seal.
I don't think it's possible to get luxury car level quiet in this car because of the glass roof, and at least my Fremont vehicle does not have the double-pane rear windows. That and the suspension (and I also have coilovers). And there's no active-noise cancelling tech in the car, which frankly comes with a lot of non-luxury vehicles these days.