The worst part about reddit in that case is that they use cloudflare which could be a 1 click update to ipv6. Previously they have stated that internal systems (spam, court orders, reporting) are holding them back from the change.
You know, Cloudflare gets a lot of shit around here for being a centralizing entity in a decentralized Internet (sometimes justifiably), but they've done a hell of a lot to push forward needed changes in the Internet infrastructure. Often at little benefit to themselves.