In company with 350+ employees. 100 of them in product&tech. Been looking a long time for developer platforms, hearing about thoughtworks putting dev platforms on "adopt". Still cannot get my around developing our own "platform", it just seems so much work.
We do have some sort of structure. A "landing zone" script invoked pr team which creates two azure subscriptions with some basic resources, access groups, service principals, service connections, azdevops project ++. Also considering adding observability components and policies into this script. I guess that's our "platform". Script can be re-invoked if extended with more components.
Teams use terraform for provisioning infrastructure. We have our own modules that should simplify their job