For me it's just using my username for login thats not working. with my mail address it works just fine. maybe that helps others too.
Even if that continues the next 5 days in a row. that's no big deal for reddit. it's barely a fraction of a percent of reddits userbase. Spez couldn't care less i thinks. the only thing that would probably hurt reddit is if everybody deletes all their conten and accounts. and it would need to be a much larger scale. nothing will change. never underestimate the lazynes and unwillingness to change of people.