The problem with old apartments is the transformer

‌Most old apartments have a capacity of about 1kW to 1.5kW per household.
Apartments built before the 90s have even less than that.
Back then, there weren't even this many electrical appliances,
and air conditioners were the only things that required dedicated circuits.
But now, the number of electrical appliances has increased tremendously, and we have "power monsters" like induction cooktops.
The problem is that people are using these in old buildings, which they obviously shouldn't be doing.
Fortunately, since many elderly people live in these old buildings, they manage to get by even with insufficient power per household for now.
Some people say you can just apply for KEPCO's capacity expansion support,
but that only covers a portion of the cost, and the apartment complexes have to pay a large amount themselves. Even if they are selected for support,
many places fail due to resident opposition and get moved to a waiting list.
And being selected isn't guaranteed; it's done by priority, and there are too many places that are desperately lacking.
As I wrote above, even if they are selected, it's only partial support, so residents oppose it
(there are so many people saying, "We've used it fine until now, why waste money?").
Even if they do expand the capacity, it's not a generous expansion. Since you can't expand frequently by considering the distant future, you should do it big when you do it. But if you need, say, 5,
they only expand by about 1
just to barely hold on.
As electrical appliances continue to increase and the weather gets hotter, if transformer issues start popping up in the summer, there will be no solution. It feels like we only have a few years left.
There are a very small number of wealthy old complexes where transformer expansion is nothing and they just say "do it immediately,"
but in most places, residents fight fiercely over whether to agree or disagree due to the cost of expansion.
It's not just the transformers; the wiring that delivers power to each unit is also a problem.
And if you ask if it's only electricity, of course, the old plumbing is also an issue (but they can't even replace it because it costs so much).
I'm not saying you absolutely must move to a new build, but considering everything, it is wise to try to move to apartments built after the 2010s if possible.