However, for me, the amount of time 'saved' for tasks like this seems like it could easily be outweighed by having to spend even a minimal amount of time tinkering/debugging the setup of these devices.
Given that my phone sometimes forgets which wifi network to use, I can only imagine having to reconfigure my microwave, washing machine, stove/oven, dishwasher, stereo, etc. occasionally. If each device forgets the wifi network infrequently, like once every six months, that means 12 times a year I have to configure wifi one of my six smart devices. This amount of reconfiguration is more time/frustration/effort than would be saved by the kinds of notifications listed.