We DESPERATELY need this

This is HUGE -- the mirroring tool is awkward at best (for me)

I would love to see this with G1 G2 over the mirrored edge. (Something like the Mirror Modifier in Blender ? )

This would be a game changer. yes please!

This will help when modeling things like helmets

Or at least have something like instance duplicate that you can mirror without welding it

Support for Radial Symmetry would be also welcome :)