Yes, you’re correct. Even in Aesara it is marked as deprecated: aesara/__init__.py at 4b266671f5b60ba2cf9e435248febfa07f632824 · aesara-devs/aesara · GitHub
In general we are trying to move away from the old C_code to minimize maintenance burden and betting on the Numba/JAX backends.
But we did want to keep the Conv Ops around because they are still so useful. I think there was an error in this PR: Remove deprecated modules by ferrine · Pull Request #111 · pymc-devs/pytensor · GitHub
Where we kept the abstract_conv, but not the conv module and the rewrites that replace the former (slow) by the latter (fast). I will open an issue on our repo to bring them back. Thanks for flagging it!