Especially with new flows, or complex flows, it’s much easier to troubleshoot.
F.e. actioncards are ‘fire and forget’; even when zigbee and zwave devices normally report their status back, the flow does not check that acknowledgement, and just says “I turned on device X”.
Now, the log action card gets triggered along with the device action card > you now know the flow works, but there’s some issue with turning on device X.
There’s even a script available to add SL cards to all flows