For example, one thing about the Gigatron is that it uses static RAM. Static RAM is fast, but expensive, and back in the early 80s even dynamic RAM was dear, and static RAM was several times more expensive than that. All the early 8080 and 6502 computers were using dynamic RAM. With static RAM, and fetching instructions out of ROM, and using a 74 series that wasn't available at the time, the Gigatron benefits from modern times.