In the recent discussions scattered everywhere, it appears that some functions should better be just implemented by DLPack so that the downstream libraries do not have to reinvent the wheels. The possibilities include

1. tensor deleter (see the discussion starting Specify Python embedding of DLPack tensors #51 (comment))
2. query if CPU-accessible (see Add kDLROCMHost and kDLCUDAManaged #71 (comment))
3. C APIs corresponding to __dlpack__ and __dlpack_device__ in the Python Array API standard for handing streams (Standardize C interface for stream exchange #65)
4. C API that could be exposed as a new Python attribute __dlpack_info__ for returning API and ABI versions (and potentially more, see Future ABI compatibility  #34, Add ABI version. #72)

cc: @tqchen @rgommers @seberg @eric-wieser @kkraus14 @jakirkham @hameerabbasi @vadimkantorov @oleksandr-pavlyk @szha @veritas9872