I believe the ask is to have any scripts loaded to persist through restarts of Redis. As is, you have to reload them on each init of Redis. As such, the onus is on applications to catch evalsha errors and load the missing scripts, in the case of Redis being restarted.
We built the same mechanism using HashMap and `SCRIPT LOAD` on restart/deployment to make a mapping table between function name and its SHA. Any client want to call the function just need to fetch the table and using the according SHA via `EVALSHA` command.
