Comment by Zanfa

> In fact, the complexity of Chat Messages and Notifications synchronisation is one of the prime reasons why React exists.

Which makes it even more ironic that in the 10 years since React was announced in 2013 and when I quit Facebook, they never managed to fix the original state synchronization bug that they demonstrated in the original React announcement for more than a few months at a time at best.

I'm sure technically it wasn't a singular bug over the years and the causes were complex, but React did fuck all in relation to the unread message counter being correct.