Not much more than just clicking an update button once in a while. But that’s a standard workflow most people are used to. Updating the clock on the standalone timers has to be done using a tiny LCD screen with an esoteric menu system while holding a manual/pamphlet that’s printed in less than 6pt text. It’s not something you do often enough to remember the procedure.

Of course you can make things more complicated if you want to in HA, or you can set it and mostly forget it if you just use timers.