@Bhack Exactly. We used to have a ticket on grouped convolution too, and it took more than 2.5 years to close. (Issue #3332 on GitHub, can’t post link here). This one is 6 months old already (it could have been filed much earlier tbh) and I am just concerned history will repeat.
PyTorch has it since at least v0.2 (July 2017, about the time “Attention is all you need” was published to get an idea of how long in DL terms). My understanding is that even jax can do it using conv_general_dilated and some paracetamol.