It's no wonder young people these days aren't getting married; the difference in housing quality is just too huge...

‌If they don't get married:
1. People who continue living in their parents' home
- Even if it's an old, outdated apartment, it's managed well, so it's better than a villa.... If the parents own an apartment in Seoul, staying there as a "mole" (living at home) provides a much higher quality of life.
2. People living alone
- Most often, they live in officetels; in this case, while the rooms are narrower than apartments, they are managed at an apartment-like level... including security.
Ultimately, if those two meet and get married and try to move into even an old apartment—since housing prices have risen so much now—they need financial support from both families... And if those two were to move into a villa or a multi-unit house, it would be such a massive downgrade from their current living environments that........
Looking at the income deciles of people getting married these days, it's no coincidence that the 10th decile (those who can afford a jeonse for an apartment or buy an old one with their own money) or the female 1st–2nd decile (where there isn't much difference between their current home and a villa;;) are so high....
In the end, it is possible to maintain a certain quality of housing while living alone, but for young people to maintain a living environment that meets a "decent standard of living" even if they downgrade after marriage, they must be above a certain income decile..