[73kl4453dz]

Algol 68 was certainly too much language for the tiny machines of 1970, but on a 2020 box it might be fairly decent.

[manbart]

There is a modern implementation if you feel like checking it out firsthand

https://jmvdveer.home.xs4all.nl/en.algol-68-genie.html

[Taniwha]

Not really, I did an implementation in the late 70s, ran on a mainframe of the time (1MHz 6Mb). The language itself is not much more than modern C in scope - and in fact many ideas that were new in 68 are expected in modern languages

The big problem was that the spec was essentially unreadable.

[Koshkin]

6MB was quite an amount back then.