OK I can think of one semi-bearish factor. Lending standards are still much tighter than during The Great Bubble of 00’s.
Really though, that isn’t saying much. That was a single crazy episode in US history. Overall, by any other historical period, lending standings are moderately loose.
Also, China is having a crazy housing bubble right now in all of its major cities, but lending standards there are extremely tight compared to ours. The standard down payment is 50%.