I'm not sure that was their position. They're not saying tech from the 60s was inherently bad. They specifically mentioned that we today are not constrained by the same hardware restrictions that gave rise to the software in the 1960s. Those are two very different positions.

For example, I like Rust. But if Rust had been introduced as-is fifty years ago, no one would have used it, because the hardware requirements to make Rust compilation practical simply didn't exist yet. Taking a week just to compile "hello world" would have been a nonstarter. Not because Rust is bad but because hardware requirements at the time ruled something like it out.

2024 is not 1964 however, and it's always good to re-examine old assumptions.