Maybe not as impressive since it's a number, but I got mine in 2021. HN names aren't terribly competitive, it seems. Maybe it's due to the more mature culture here.
Yours does not include an English dictionary word or name though (unless sh counts, but that's shorter and less common than 'max'), but yeah 5-char words being available, I'm also not too surprised by.
What I've done on reddit for throwaways is use 123123 as password so they can be reused. Not a one has gotten 'hacked' yet over months of use, I'm quite surprised tbh. Maybe I should publish the password on the relevant accounts once I decide to stop using them. Ideally there'd be a time factor before it changes hands to avoid confusion and editing old posts, but I would probably forget (hence the dummy password strategy).
And 36^5 is even a bit bigger. (Numbers are allowed. Think that's it though - case is recorded, but I don't think you can sign up Dheera, because dheera exists.)