See, I’ve always looked at this from the other end, perhaps because I’ve been riding bikes too long or maybe I’m just stuck in my ways. I ride a turner 6-pack, the sort of bike that might justify a double and bash. I ride it in the peaks, an area with its fair share of rocky technical stuff. However, I only occasionally scrape a tooth on the big ring. If I’m carrying a metal disc around, I might as well use it for gears.
Specialized do have quite low bottom bracket heights but the wife finds this leads to more pedal strikes than chain ring strikes.
The only advantage I can imagine in would give me is that a handful of times in the last 25 years, the chain ring has bit he in a crash. It would avoid that.
You’ll still have the front much and shifter. I’d imagine the weight difference between a chain ring and a bash ring isn’t much so there’s no real weight saving either.
Guess it depends what, where and how you ride but for me, it’s a triple all the way.