Nip65 is the new standard tho. Seems kinda stubborn to be against using it even without the gossip part. Loosing contacts was always problematic right, so why not upgrade? If every client looks for 10002 that's what makes nostr client switching seamless (and has been working quite nicely for me in gossip, snort, coracle, amethyst, primal, habla news, yakihonne, flycat).