Earlier quoted context omitted.
This is a feature critical for wide adoption. Most users will swear off any app that makes it easy for them to lose all their chats.
There are a million apps which store messages on a server, those users are already on those apps. The thing that differentiated signal is the data-less functionality.
Signal should not stay as the simplest possible iteration of an encrypted chat application. If we want more people to use privacy-concious applications, those applications need to evolve.