>right now I have 4K on 24", at 200% scaling
I have Dell P2415Q, from 2015. There are, like, 4 other (legacy) models of 24" 4K out there, and that's it. I've no idea why they don't manufacture them.
I also have one bought used. It’s the only way to have 4k and 200% scaling on Linux without everything being too big or too small. Size and ppi are perfect but sadly other aspects are becoming really dated (bad colors and contrast, high latency, low refresh rate etc).
I have the same Dell (since 2016) and love it. But eventually I transitioned last year to a 27" 4K monitor. Still almost as sharp (KDE at 175% works fine for me).
Downsizing from a 27" 5k to a 24" 4k, could not find anything besides a new company called JAPANNEXT (they are French)
Good thing I have three of them. I’m set for life.
Yes it's sad :'( I have the much cheaper LG 24UD58. Also no longer being manufactured.