It feels like we are entering an era where 10,000 won for a tray of eggs doesn't even seem expensive.

This isn't simply a matter of perception caused by continuous inflation.
It is because the number of people who focus on their diet and nutrition has increased, leading to an explosion in the number of people who have realized the utility of eggs.
In particular, if you look at the recommended breakfast menus being shared everywhere,
almost all of them include boiled or soft-boiled eggs.
We have entered an era where eggs are no longer just a side dish of fried eggs
on the table because they are cheap.
Soon, even restaurants will likely charge 1,000 won
instead of 500 won for a single fried egg topping.