[RTTY] Lack of 40m RTTY Activity

[Lee - N2LEE]

Why is there little to no night time 40m RTTY activity ?

During the day 20m is great but when I get home late and 20m is dead there is no other RTTY activity. At least none I can find.

I realize 80m would be fairly local but I would assume there would naturally be 40m activity at night but I almost never hear any
RTTY signals.

Is it just band conditions, my station or simply the way it is ?
I see all kinds of PSK & JT65 signals but no RTTY.

Lee - N2LEE