If you don't use the 6pm feature it doesn't matter if the time is accurate. I have a rice cooker that's permanently blinking 12s, and two TVs that I have no idea what time they're set to because I stopped updating them for DST and there has been a power outage or two since then.
If you're unlucky and _have_ to have everything in sync then you've chosen your pain, so good luck to you. =)
We don't use the bread maker time, but when setting the mode, it shows the estimated completion time rather than duration, so if you want to know how long it's going to take, you need to know what the time is set to.
If there was a way to disable the time completely, that wouldn't be so bad, but I don't like the "set me!" flashing 12:00 all the time on the microwave, and setting it at some random wrong time seems worse than having it exactly an hour off.
If I had to change dozens of clocks but not change my sleep schedule I would do that.
I think that depends on how many clocks you have. My wife likes clocks and we have one in nearly every room, including 2 that are only reachable with a ladder. That's in addition to the stove, microwave, and even the refrigerator and toaster oven have a clock for no good reason. Plus the rice maker, bread maker and coffee maker also have clocks to allow timed cooking (i.e. have the rice ready by 6pm).