I am so, so sorry. May his memory be a blessing. And if there's anything I can do to support you from here, let me know.

I think that's how I'd want to go—sudden, minimal suffering, before my life got too constricted. But it's scant comfort to one's loved ones, who don't get a chance to say a proper goodbye.

I hope you get your big celebration of your dad's life and work. He deserved that.