Added support for new opt-in experimental features
autoMemoryReclaim – Makes the WSL VM shrink in memory as you use it by reclaiming cached memory
Sparse VHD – Automatically shrinks the WSL virtual hard disk (VHD) as you use it
Mirrored mode networking – A new networking mode for WSL that adds new features and improves network compatibility
dnsTunneling – Changes how WSL resolves DNS requests to improve network compatibility
firewall – Applies Windows firewall rules to WSL, and allows for advanced firewall controls for the WSL VM
autoProxy – Makes WSL automatically use the proxy information from Windows to improve network compatibility

https://docs.microsoft.com/en-us/windows/wsl/install-win10?WT.mc_id=thomasmaurer-blog-thmaure

du coup sur mon PC :
 uname -a
Linux P400S 4.19.104-microsoft-standard #1 SMP Wed Feb 19 06:37:35 UTC 2020 x86_64 GNU/Linux

https://blogs.gnome.org/alexl/2018/09/17/flatpak-on-windows/