You need to be on the insider programmer which forces telemetry and means you have a PITA windows style upgrade every other week (and the nagging associated with it).
Whilst you can read /mnt/c/ you can't read virtual file systems such as Google drive stream /mnt/g/ is just empty.
You need to do a bit of fuckery like pinning your ssh-agent to a known file socket and test this in your bash/zsh startup - not a biggie since you arent starting this off your WM
No X support - there are third party x viewers though but not officially endorsed. So no apps like xkeynav and xkill.
None of the intellij ecosystem have WSL support - sure you can set the terminal to be use wsl.exe but stuff like using your WSL2 distro's openssh config or using the agent running in your WSL2 etc... arent there or coming, VSCode is lightyears ahead in this department due to the way its modelled. Sadly intellij team aren't thinking in the same way of the vscode team, so instead of proxying through a remote demon they are thinking of doing something like reading //wsl$/distro/home/you/.ssh/config instead, hacking WSL support in their ssh/git bits
If you're doing C or C++ development, CLion does support WSL compilers/debuggers.
FWIW you can upgrade to the Fast Ring version of Windows that gets you WSL 2 and then switch to the Slow Ring that only gives you updates every month or so.
If you are an embedded dev keep in mind that USB or any native devices on WSL2 is not supported.
If you are a web dev keep in mind that localhost is not available so that you need to figure out the IP address of WSL2.
Which sounds like a non-issue, but is actually quite annoying, as almost every unconfigured daemon binds to localhost...