At previous job, the management wanted to optimize Azure costs, so they hired a consultant, who immediately went with the easy picks, like using reserved instances, all with pretty graphs and shiny saving percentage numbers on his presentations. At no point there was even a single consideration of "do you guys even need these instances at all? what is this?". So that's how it works, hopefully not always.
At previous job, the management wanted to optimize Azure costs, so they hired a consultant, who immediately went with the easy picks, like using reserved instances, all with pretty graphs and shiny saving percentage numbers on his presentations. At no point there was even a single consideration of "do you guys even need these instances at all? what is this?". So that's how it works, hopefully not always.