If you're looking for personal experience, I don't have it...But author does say "...but it’s common for sites to use systems like Redis and Memcached, which wo

If you're looking for personal experience, I don't have it...But author does say "...but it’s common for sites to use systems like Redis and Memcached, which works for tiny sites, but still works at massive scales." ...which would be my first WAG if I had to design it for scale. Sites were at scale before JWT conjured up.