And that's great if your organisation has an attention span resembling something other than the usual squirrel on crack. The failure mode of iterations that lo

And that's great if your organisation has an attention span resembling something other than the usual squirrel on crack. The failure mode of iterations that long in my experience is incessant "can you just take a look at X, we need it for next week" interruptions that balloon out to consume the team's attention. With a 90 day iteration you can't say "let's get that into the next sprint (and leave me alone until then)" as often as you can with a two week or a one week sprint.