I work at Cloudflare, since joining almost 3 years ago I've seen multiple pieces of technology get deployed and then replaced because "it just doesn't work at o

I work at Cloudflare, since joining almost 3 years ago I've seen multiple pieces of technology get deployed and then replaced because "it just doesn't work at our scale". It feels kinda weird to say that, but then I see what our DNS servers are doing, or I learn about some customers that struggle to consume their own logs due to the speed at which we produce them, and things that you think are not an area of concern become that... when you have enough traffic flowing through your systems. Pretty much the only thing that has really stood out is Kafka. Kafka does work at scale.