Oh, I have dabbled in OS dev a tad already actually, although not in a long time. I think if I went for OS dev nowadays, I’d prefer to try and start as an EFI binary because I believe that way you get to start directly in long mode, and have some filesystem drivers to bootstrap with at least. Still, I don’t know if I will ever have the drive (and spare time) to push it as far as you have gotten Lilith.