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This is the Di2 thread. Extreme cross-chaining doesn't happen here.
As for talk of triples, a few years ago I wrote the Arduino code to shift my half-step triple using RC servos, was a piece of piss to rule out extreme crossover.
I can imagine many a thrown chain or worse.
There's the rub (or rather lack of it)! Di2 thread!
What would a Di2 triple be like? Come on Shimano...
How long do folks give it before 1x is yesterday?
There's a very good reason front derailers were a thing, and it wasn't all about range.
Richard Gate had a "somewhat bodged" 3x setup on AMR.
I like the idea but having to remember that you can't change into the extremeties isn't something I'd like to play with. I can imagine many a thrown chain or worse.
I'm pretty happy with 30/46 w/ 11-42 on the gravel bikes, though I'm tempted to see if a 46T will work.
On the MTB I've 30 w/ 11-51T or whatever Shimano is. I wouldn't want a bigger ring on the front and it's rare that I'm 'that' bothered about spinning out the 30x11. Just coast bro!