we all have lucky moments with something like arty, right?
i got so many KT, elefants, panthers, Jagdtigers, blobbs etc with B4 that i would choose this unit as the best arty out there...most boom for one click. its like a Sturmtiger shell hitting your units ...while the B4 can be spamed and are pretty cheap and has much more range than a sturmtiger...cant be evade...have no big warning...its the perfect cheese unit
The B4 has been little more than a meme for years. It's too unreliable. Sure, you might pull off an amazing shot here and there but it's often a poor investment. Plus the LefH will counter it easily.
In team games the LefH is seen almost every game. Usually two are built then left on counter battery until the enemy indirect fire is subdued. Then they are usually vetted up enough to fire into the enemy base or anywhere else on the map.
Plus as soviets if you go for ML20 you are going without T34-85s, which a lot of players consider to be a vital unit in team games. Whereas for axis the LefH and doctrines in general are more of a supplement than a requirement.