Sync for Lemmy

But I can say that our "bathroom tablet" that we can all grab as needed that has the fonts for my account set bigger, my kid's smaller, etc, it's handy.

Ignoring the fact that the "communal poop tablet" is probably not all the terribly common, why on earth would you rely on In-App-User-Profiles for that instead of Android User Profiles?

but having import/export as an option that will let you set up each account exactly the same if you want,

That might have been fine with one or two Reddit alt-accounts, but Lemmy is an entirely different beast. I feel like I'm instance-hopping almost daily for one reason or another and I'm rapidly amassing new accounts. Given how aggressively some instances defederate (I'm looking at you, Beehaw), there's little choice if you want to experience most of what Lemmy has to offer.

Suddenly, keeping all settings on these accounts in sync becomes a rather tedious and arduous task, which requires repetition every time one chooses to change their settings.

Compared to that, the edge cases where it may actually be useful behavior are ridiculously small. So, having this as the default and only behavior is simply bad design.