So cool that you got to work with teams of devs that where able to do that. Was it for software used in a OT environment? Cause stuff like telegram seems a lot more like that imho.
And the bredth.. 30 people can cover it all, yes. Doing that in a 24/7 global environment means 3 of several competences, in shifts, covering timezones. It's not as if you can just click out at 5 and come back tomorrow.