The headline would be more accurately stated (according to an image in the article) "81% of IT teams directed to reduce or halt cloud spending growth " The most common response (39%) was the C suite wanted spending to remain the same.
The problem is that if your business is dependent on the cloud, that's not actually your choice: The providers can, and will, change the prices whenever they want. As the crunch comes and even the FAANGs start layoffs, watch how fast buying an in-house VMware stack seems like an absolute bargain, including paying staff to build and maintain it.
Probably your savings will come from beign able to get bigger machines. After 4 years in the cloud I am still surprised to see how performant physical servers are.