My company is was full on into GCP and after a year of terrible support management suddenly decides to go all in into Azure. We use every managed service from GCP including BigQuery which is nearly impossible to find a replacement of in Azure. Appengine needs to be converted to Azure Kubernetis Service. So its not a technical decision completely, just that company signed a bigger deal with Microsoft and wants to pay a single bill. Based on feedback from other teams company feels Azure support is way more professional when it comes to production outage. Now all of 3 years work sing Google services needs to be re-written in "cloud agnostic" way.