High dpi displays better solution for laptops for Linux

 Instead of modifying each font size, it turned that adjusting only font scaling is enough.

In KDE it's "Fonts - System settings" -> "Force font DPI: 144" for 13 inch fullhd screen. Although in this way some apps may scale icons as well, e.g. LibreOffice. But still it's better than display scaling setting, which brakes some apps like Steam and games.