I do not completely agree with you.

Yes, the problem is still there even with scrypt or any strong hashing function. But the (s/the/one) problem here is the use of a simple PIN code ( from 4 to 8 digits ), to store securely your passwords! Why can't we set up a passphrase instead? And then use scrypt. Morover, I think that PBKDF with 10'000 iterations, as advised by OWASP (https://www.owasp.org/index.php/Password_Storage_Cheat_Sheet), is better than clear-text; also if you consider just an 8 digits PIN code. Just my opinion.