I can say that because I've done it
I ran my sons old rustler for a few weeks in stock truck just to sort of prove it can do it.
The only real upgrades were RPM arms, RPM carriers, good set holeshots all around and some TLC to the shocks.
I was never less than top 3 and won about half of the races I ran with it. So it's technically possible to get decent results on the track. But you can quickly outgrow it. I was happy to be back to my Losi.
Obviously this applies to club level. No way could it be competitive at larger events.