This isn't Reddit. You don't need to talk in absolutes.

Similar to WittyShizard, my experience is very different. Said Rust application uses 1200 dependencies and I think around 50 MB RAM. We had a Kotlin application beforehand, which used around 300 dependencies and 1 GB RAM, I believe. I would expect a JavaScript application of similar complexity to use a similar amount or more RAM.

And more efficient languages do have an effect on RAM usage, for example:

• Not using garbage collection means objects generally get cleared from RAM quicker.
• Iterating over substrings or list elements is likely to be implement more efficiently, for example Rust has string slices and explicit .iter() + .collect().
• People in the ecosystem will want to use the language for use-cases where efficiency is important and then help optimize libraries.
• You've even got stupid shit, for example in garbage-collected languages, it has traditionally been considered best practice, that if you're doing async, you should use immutable data types and then always create a copy of them when you want to update them. That uses a ton of RAM for stupid reasons.