AWS egress prices have been the same for a decade despite massive networking advancements.

In two decades, since 2006, they've only come down by about 50%.

That's not exactly true, they expanded the free tier from 1 to 100GB/mo (1TB/mo out of CloudFront) and dropped egress from ~20c/GB to ~9c/GB. This was due to pressure from the Bandwidth Alliance formed by all the other Clouds and spearheaded by Cloudflare.