Please actually read
> Registration Lock expires after 7 days *of inactivity*
If you use signal once a week you're fine. Maybe it should be longer but that's a different argument and there's no reason to be disingenuous about it
am I reading it wrong? but on my phone if i activate reglock again it says that if pin fails the account is blocked for seven days. I asume that after 7 days one still needs the pin to register or am i wrong?
You'll get the opportunity to change the pin.
There's a balance they want to strike. You can't assume phone numbers are unique to a person across time. So they need to be able to expire when someone stops using a number.
But again, acting on the other side also gets a notification in the chat stating that the security number has changed. The new person doesn't have the signal chat history. So if you're talking about sensitive things then it's a strong indication you should reverify their identity. Not practical for every day users but that's also not a typical threat scenario
It does not matter if you lose control of the number, the new person will be able to register. The 7 days period is for you to get control of the number back or make sure all your contacts know about the issue.