ip vs ifconfig commands pros and cons

At some point, in some teaching material (from Linux Foundation) on Linux that I came across, the following is mentioned: > ip command is more versatile and more efficient than ifconfig because it uses **netlink** sockets rather than **ioctl** system calls. Can anyone elaborate a bit on this because I cannot understand what's going on under the hood? P.S. I am aware of this topic on those tools but it does not address this specific difference on how they operate