The core question is what is the value they bring compared to what they cost.
You will definitely get support reasonably fast if something breaks because of them but that’s not where breakage happens most of the time. The issue will nearly always be with how you use the services. To fix that, you need someone who understands both the tech you use and how it’s offered by your cloud provider. At which point, you have an expert on board anyway so what’s the point of the huge bill?
A hoster will cost you less for most of the benefits. They already offer most of the bricks required for easy scalability.
You will definitely get support reasonably fast if something breaks because of them but that’s not where breakage happens most of the time. The issue will nearly always be with how you use the services. To fix that, you need someone who understands both the tech you use and how it’s offered by your cloud provider. At which point, you have an expert on board anyway so what’s the point of the huge bill?
A hoster will cost you less for most of the benefits. They already offer most of the bricks required for easy scalability.