Tesla is not about to solve anything at all.
They are still at Level 2, barely, and even that is not working and it had to be pulled already.
Solving autonomy requires to reach Lev 5.
It took 10 years to get from Lev 1 to Lev 2.
Every level is exponentially more difficult than the previous. You do the math.
Most experts agree that "solving autonomy" is probably decades away. Many think it may not be possible at all.
Personally I think it is possible, in a few daecades, but crucially not with the technology (ML/DL) we use today. We first need a complete new foundation for AI before we can do it. A foundation that at the moment we don't even know what it is.