Minecraft is not more demanding than some years ago, they didn't neceserily raise it, they just updated the info page. This snapshot from 2022 says minimum 4gb and recommend 8gb: https://archive.ph/NTMU4. Source was posted some days ago: https://news.ycombinator.com/item?id=49038901

It's a pretty weird recommended amount of RAM too. 8GB is enough to run heavily modded Minecraft. Vanilla Minecraft can easily run on 4GB or less.