depending on where you live and how you use your tractor,
yes, they are that bad.
My first modern 4x4 loader tractor had loaded R4's (dealer recommended)
Lots and lots of snow here, and clay soil that turns to slick glue when wet.
No chains, so I got stuck constantly on snow and ice, even in 4x4.
And when spring came, forget it, left it in the shed after getting stuck numerous times with the sticky clay quickly filling the
shallow cleats and tires looking like brown racing slicks.
Cost was too high to switch to Ags (different rims required)
traded the whole tractor, got another about the same size with
R1's all around.
No chains and I now never get stuck....
People say that r4's don't damage the ground as much.....
ya maybe, but if I have to drive across a wet field/lawn with Ags, I might leave some cleat marks..no spinning.
If I have r4's on, the foot deep ruts made as it spins and buries itself are much worse
ps when the dealer says with r4's, if you add, weight, 4x4, diff lock, chains, the traction will be good....
counter with....if my tractor has all that and I add Ag tires....twice as much traction!