[DaveBlake]

If you've built a large queue of songs and a listening to it, it's a valid use case to want to see it survive restarts.

Why would you build a large queue of songs? Sounds like an old fashioned manual .m3u playlists to me, and you could always save just a queue of songs like that if you want to turn Kodi off.
Why not make use of the library instead - smart playlists built using rules.

Anyway a reasonable feature request, but please don't add it as an issue on Github we use that for bug reporting only.