For one, Google TPU. Another: Cerebras wafer scale AI. AMD MI100. Etc etc.
Even if they screwed the pooch with Nvidia, there are plenty of competitors in this space.
Now Tesla has to build its own software stack for large scale distributed learning, which might be harder than the chip design.
Is Tesla really the kind of company that wants to carry the expensive loadstone of training and inference software + hardware?
It's not like PyTorch is gonna run on this thing unless they create a fork. And a huge advantage of things like NVidia are NVlink / NVswitch. Both hardware, and software, that efficiently distributes data at 600GBps across your GPU clusters.