If you have a 5K2K monitor, as I do, then you are unable to enjoy decent 1.25 scaling. Everything looks pixelated because Apple don’t allow a ‘proper’ HiDPI mode with M1s.

The same monitor is absolutely fine on a 2019 Macbook Pro.

If you use BetterDummy, it creates a ‘fake’ display to mirror to. The result is beautifully clear display on the 5K2K.

This is the crux of the issue. M1 macs can absolutely do nice 1.25 scaling on a 5120*2160 display to give crisp text in the 140dpi range but they disable it.

That is the issue IMHO.