If you're building the bike with MTB tyres and an MTB crankset anyways I'd say why not. So more like a drop bar MTB, not a gravel bike. The Salsa Fargo can be set up for boost. 🙂 But it's a full on drop bar MTB.
If you're building a more "normal" gravel bike with tyres in the 38-45mm range and road-ish gearing i'd probably skip boost.
Pynchonite wrote:Ditto what they said plus the idea that you'd have a difficult time finding 11-speed hubs if you decided to run anything like a road gearing.
Just some random info, the new Shimano 11psd 11-34 will work on 8-9-10spd freehub bodies.