Or a new category, like "Ask HN" and "Show HN". Maybe call it "Hot HN" or "Hot <topic>" or something like that. Could be used for future hot topics too. If you change the link bold every time a hot topic is trending, it could be even used to show important stuff.
Tangentially I noticed that Reddit's front page has been conspicuously absent on coverage of this, I feel a twinge of pity. Maybe there are some some subreddits but I haven't bothered to look.
Their front page has been mostly increasingly abysmal for a while.
The technology sub (not that there's anything special about it other than being big) has had a post up since very early this morning, so there are likely others as well.
I get that HN takes pride in the amount of traffic that poor server can handle, but scaling out is long overdue. Every time there's a small surge of traffic like today, the site becomes unusable.