I even ordered the re-releases for First & Only and Nightbringer to get some nostalgia and hopefully be able to enjoy a proper book again, since BL appears to be hell bent on only releasing short stories and novellas at the moment.
I got First and Only again as well. And I loved it. Now naturally reading the whole series again for the umpteenth time.
Still got about 3 Horus Heresy LE novels, Damnation of Pythos and one of the Anthologies, fuck knows which one, it's not even out the delivery box, that's literally how uninterested I am in reading it, so many anthologies lately, all just re-released shorts. But like you said, I've invested so much, I feel I have to see it through.