I wish them the best of luck. Not that they have any chance of success but the more damage they cause to the Russian army, the better

Was there actually anything stopping them before, other than some traffic cops with a grenade launcher, and some excavator operators frantically digging up the motorway?

No, but they chickened out and now Putin has had a month to set up defenses

Military equipment in Russia protecting Putin is military equipment that can’t be used to attack Ukraine, so this is still a win.

Especially if Wagner manages to destroy some or a lot of them.