Debian Sid. General questions.

[타토카 <cybertatoka@gmail.com>]

Hello, dear Debian Community! I just want to ask you a few questions:
1. How is Debian Sid stable then Arch Linux, for example? How often does Debian Sid crash and breaked?
2. I have seen on the Debian official site about Debian Sid and PAM. If I have this problem with PAM, what should I do?
3. And how is it a good idea using Debian Sid for professional work and programming? I know that people use Arch for it, but I don't know about using Debian Sid for it.
4. As I know Debian Sid does not have some packages like Arch, why? They have rolling releases? I mean packages, for example, hyprland.