For a more radical strategy on keeping company size small, I like how the startup Stedi has taken a crack at innovating on this. Their entire tech stack is structured around AWS offerings, mainly serverless. The idea is that by paying a premium to Amazon, they can outsource all server management, scaling, etc. issues which typically take up tons of engineering bandwidth. Presumably, Amazon's round the clock experienced team will also be able to handle it more effectively than they could. In the meantime, Stedi can now avoid hiring for tons of jobs and keep headcount as small as possible, enabling engineers to only work on things that matter.
While I'm not sure how Stedi's strategy will play out, it is one of the few opinionated stances on company organizational philosophy that attempts to take advantage of recent evolution in cloud offerings, and internalize the consequences of those improvements.