According to the information that I collected (asking around, investigating, etc.), it seems that there are no critical users of ubuntu-fan.
Moreover, considering the impact of the ubuntu-fan kernel patches (that would require a major refactoring to avoid breaking the network eBPF ABI), we decided to proceed with the plan to deprecate this feature in all the noble kernels.
Therefore, all the user-space components that rely on such feature can follow the same plan and drop their corresponding ubuntu-fan support (iproute2 included).
According to the information that I collected (asking around, investigating, etc.), it seems that there are no critical users of ubuntu-fan.
Moreover, considering the impact of the ubuntu-fan kernel patches (that would require a major refactoring to avoid breaking the network eBPF ABI), we decided to proceed with the plan to deprecate this feature in all the noble kernels.
Therefore, all the user-space components that rely on such feature can follow the same plan and drop their corresponding ubuntu-fan support (iproute2 included).