Not a user of Reloadr, but hot code reloading is a big thing on my Java development process. There are servers and use cases that take a long time to start or setup, and having the possibility to debug -> edit code -> re-execute a specific method using the same context goes a long way.
For production usage, maybe that wouldn't be considered safe, but there are companies that provide services with this purpose (e.g. JRebel).
For production usage, maybe that wouldn't be considered safe, but there are companies that provide services with this purpose (e.g. JRebel).