Elixir + Phoenix is amazing. It's one self-contained stack. Just Elixir processes (and Postgres) which takes care of everything other ecosystems farm out to extra services. Background jobs, real-time channels, and even hot-code deployments run natively within the same BEAM runtime.
Working with this with a small team with one simple stack is a breath of fresh air in today's world.
He did what he said he would. It was a prearranged agreement many people thought was unreachable, and he did.
I find it inspiring that he has long term visions and executes to implement, what people would consider, insane goals over decades. I feel this is what makes Elon stand out, and worthy of the pay day, especially when you pull off what you said you would.