I'm currently investigating Shout. If I can get it to function I will enable it.
However, just like any other forum based community developed chat plugins it will have some caveats.
- At some point, messages may be lost. It may become deprecated or not compatible with forum upgrades and need to be removed and possibly replaced.
- Private messages may well become public or exposed through issues with the software or during upgrades.
The risk of the zulipchat instance having these problems is low, so it will continue to be the recommended chat setup at this time.