LogFAQs > #971820741

I mean all that you'd miss not doing all the social links is being able to fuse like 2 or 3 personas that you probably wouldn't even use anyway.

the main reason that social link completion even an issue is because you have to have certain social stats to even start a few of them. So you could just let him start a NG+ from your clear save file and start out with maxed out social stats, since social stats are one of the few things that actually carry over. Though that would just leave not much to do on nights where you can't go into the dungeon or days where you can't do any social links.