You have a half-sibling you used to be close to.
For whatever reason...the half-sibling stopped talking to you.
You don't know why.
10 years later you hear the sibling isn't doing well so you reach out.
They don't return your call.
You're hurt but keep it moving.
Years later you hear good news about the half-sibling.
Would you reach out again or would you consider that ship sailed as far as YOUR initiating contact is concerned?