> every single large company I worked for had AWS, Azure and Google Cloud,
Multi-cloud is different from on-prem related stuff like multi-hypervisors, because there are multiple billing methods, the muscle to migrate is much better built in the industry, and your cloud costs can be placed within R&D (which traditionally gets way more leeway due to tax benefits) whereas any IT Infra spend will inevitably fall under the Finance&IT budget.
Of course it's very different, but it's the same in how buying the same functionality from a competitor is not a reason to get you fired unless there are other specific conditions.
Multi-cloud is different from on-prem related stuff like multi-hypervisors, because there are multiple billing methods, the muscle to migrate is much better built in the industry, and your cloud costs can be placed within R&D (which traditionally gets way more leeway due to tax benefits) whereas any IT Infra spend will inevitably fall under the Finance&IT budget.