https://www.minecraft.net/en-us/article/minecraft-java-editi...

> For minimum requirements, the new target is 1080p at 30 FPS using the Fast preset. This means a 64-bit system, 8 GB of RAM with a discrete GPU or 12 GB with integrated graphics, a 4-core processor, and a Vulkan 1.3 capable GPU with at least 2 GB of VRAM.

> For recommended requirements, the new target is 1080p at 60 FPS using the Fancy preset. This includes 16 GB of RAM, a stronger modern processor, and a more capable graphics card with 6 GB of VRAM.

This blog post also implies that the requirements bump is due to numerous changes to Minecraft over the years, not just the change to Vulkan.

> If you already play Java Edition without issues, you may not notice anything changing right away. If your game often struggles, the new requirements may help explain why and give you a clearer target for a smoother experience.

> [...] and give you a clearer target for a smoother experience.

Actually, this means you're better running and older version. Is not that Minecraft makes huge improvements with each release. IMHO not enough to justify 16GB of RAM and a GPU with at least 6GB of VRAM.

Especially these days with memory being so expensive.