I’ll still argue that HD-DVD is mostly the better technology. The things which BRD tried to claim were what made it better were not things which would fundamentally have stayed with BRD. The interactive layer was finalized first on HD-DVD and was better.
All that said. I have many HD-DVDs and the drive. Before my drive fails, how would I archive my movies. 🤔
Probably for the same reason Spanish used to consider ch, ll, and rr as a single character.