I am noob and just wondering (based on own and other experiences) that there is no way to reload settings (config). It is very slow process to iterate how to configure ex. groups and then restart the server. I find all of this very confusing and frustrating.
you can reload groups scripts and automations without reboot (Configuration > General) but if you make changes to your devices or add new ones, you’ll need to reboot HA I’m afraid.
I’m too hoping it changes with future versions