The above post https://news.ycombinator.com/item?id=45840724 links to 71.3 KiB of data; since it's a 5-nybble prefix (20 bits) we may easily estimate a size of 71.3 GiB assuming that's a representative sample. Not unfeasible nowadays, but it seems you do have to make separate requests and would presumably be rate-limited on them.
If you only download the hash pages corresponding to passwords you hold, even supposing that everything else is fully compromised, an attacker would have to reverse a couple thousand SHA-1 hashes, dodge hash collisions, and brute-force with the results (yes, yes: arson, murder and jaywalking) to pwn you.
If you only download the hash pages corresponding to passwords you hold, even supposing that everything else is fully compromised, an attacker would have to reverse a couple thousand SHA-1 hashes, dodge hash collisions, and brute-force with the results (yes, yes: arson, murder and jaywalking) to pwn you.