New tricks...
I think the problem is that it is very hard for someone with a dementia to learn new skills, and operating a remote control which is different even if simplified can be difficult.
We programmed the TV for my mother so that she could watch all "her" programmes every day. This worked fine until she switched the TV off and forgot that she had switched it off and how to switch it back on again.
I have grown very suspicious of products marketed for people with dementia, often the blurbs appeal to our understanding (easy/simple/big buttons/clearer script) rather than the reality of the person with the dementia where habits are ingrained, emotional responses can be refreshed or renewed but learning seems to stop happening. Also isn't it strange that the electronic items without the super snazzy features tend to cost more?
I confess I have been guilty of clutching at straws, thinking that buying this or that might help to "cure" the problem of not knowing the day, the week, the season, how to work an appliance. I'm beginning to accept that my mother's dementia is a fact to be faced and not a problem that I can solve.