Not really.
I’m still super new, but I don’t mind having a limit of 5-6.
I just make sure I send as many as possible, then I go about my life and get surprised if I get something back.
I also feel like it would be overwhelming and a little impersonal to me to write so many at once, when I have received some where I felt the sender took time to talk about other stuff. This is just to me though