Because it’s not proven. Smart people will not move their infrastructure supporting billion-dollar business onto something, that might break in unexpected ways

Because it’s not proven. Smart people will not move their infrastructure supporting billion-dollar business onto something, that might break in unexpected ways while also hiding the reasons it broke. Abstractions are dangerous, most really big-scale folks seek ton understand their entire stack and have as little abstractions as possible down to their own hardware. Why? So you still have a reasonable chance to understand and control your entire stack.