Isn't WSL2 just a VM?

WSL1 is a lightweight translation layer that runs Linux binaries on Windows with minimal overhead, while WSL2 is a full Linux VM built on Hyper-V that offers better performance and compatibility at the cost of higher memory usage (around 1.6GB idle). WSL2 dynamically allocates memory, integrates with Windows desktop through WSLg, and stores files in a VHDX image. Both versions can be converted between each other, with WSL1 better for lightweight tasks and WSL2 for workflows requiring native Linux performance. The main tradeoff is WSL2's file management complexity versus WSL1's I/O performance limitations.