Work with PuTTY 'connection sharing' system

Development versions of PuTTY implement a connection sharing scheme to allow multiplexing. So, you can have multiple terminal windows and psftp connections all sharing the same connection.
see: https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/ssh2-generality.html
Could winscp work with this?

I do not think this feature is good for file transfers. It would be bottleneck.

Given the time to setup and tear down some connections (specifically using kerberos auth) when transferring small files I think we should be given the option of using this where it makes sense for some environments.
Have it disabled by default, but please provide a check-box to enable it...