What is the challenge on cardano's architecture?

My question is pretty simple: What is the challenge architecture solution experience in large scale?

your question makes me hurt, not a english native speaker, can you elaborate a little more?

I think he wants to know what are the main challenges that the developers of cardano must overcome in order to design it as a highly scalable system

The team is composed of some very talented specialists. They explain exactly this challenges in some youtube videos: https://goo.gl/KRjFkY