Ctrl+V paste works for me on WSL. My secret is that I have given up on WSLg and use a standalone X Windows server. Specifically, the X410 X Server. This removes a whole lot of weird behavior including the ones described by the article.
you do you, but I've had only good luck with WSLg. my main gripe with it is that it could be doing more. internally (part of?) WSLg uses the RDP protocol, which natively supports audio forwarding, USB passthru and smart cards. yet none of it's wired up.
(disclaimer: I work at MS, not on WSL)
I have not tried this mostly because I figured it would a resource hog and clunky. Are you describe your experience with X410 on WSL in some more detail? What are the downsides?