Yes, it is good that update-manager can do removing, as that is what most people use anyway. linux-purge might still have some use e.g. if for some reason /boot becomes full, or there are non-autoremovable kernel packages (which may happen in 14.04 even with kernels installed using update-manager Bug #1439769).
Yes, it is good that update-manager can do removing, as that is what most people use anyway. linux-purge might still have some use e.g. if for some reason /boot becomes full, or there are non-autoremovable kernel packages (which may happen in 14.04 even with kernels installed using update-manager Bug #1439769).