Scheme works great in SICP because it doesn't get in the way. After the first few pages, it doesn't feel like you're reading a programming language so much as reading the direct expression of concepts discussed in the text. The programming language learning hurdle is almost nonexistent.
That fact reduces cognitive load on the reader, freeing up mental resources that can be applied to the concepts presented.
That fact reduces cognitive load on the reader, freeing up mental resources that can be applied to the concepts presented.