Hyperbola, Parabola too, if I am not mistaken. I know of at least one person that liked using hyperbola on LibreBoot but I didn't convince him enough to try Adelie. I've been a fan of Adelie for a while, beta1 I think (Fall '18), and I am still here. I think it is worth the trouble to borrow a different machine, make an installation of the base system, then use dd and copy the partition image to a disk and transfer it to your libre boot (run configure grub/syslinux again on the new host).

To Adelie team: Maybe a tarball of the base system, no kernel, should also be available for someone experiencing boot problems, so one can chroot and setup an installation on their own.