apparently russians are freaking out that HIMARS is so effective. Command posts and ammo dumps are being lit up every couple of hours. And RU doesn't have the aviation to go seek and destroy HIMARS with.
In the end, the failure of the RU air force is one of the most shocking pieces of this. RU aviation was supposed to be able to challenge the F35. But nah.
This is fun, until RU decides they need to divert attention away from their massive losses and does something completely obscene like attack residential Kiev with fuel-air and cluster. Which they probably will do, RU being RU. Barbarians.