That assumes you have another computer that isn't a brick. I have 6 other computers within this house, yet only one other one (my wife's) is currently functioning.
Yeah, true, I'm assuming most people here have old machines that still work. It's good to have one, if you don't!
My secondary is a 10-year old laptop which gets regularly used while sitting in bed in the morning, occasionally for actual work. The other backup is an old desktop I donated to my wife a few years ago, containing an unplugged SSD which is exactly as it was when I last used it. Both will still handle most of what I need, just a bit slowly.
Either you have been extremely unlucky, or a good time investment for you would be to fix a few of the non-working ones. That's likely a better use of your time than wondering how to leave notes to your future self.
My secondary is a 10-year old laptop which gets regularly used while sitting in bed in the morning, occasionally for actual work. The other backup is an old desktop I donated to my wife a few years ago, containing an unplugged SSD which is exactly as it was when I last used it. Both will still handle most of what I need, just a bit slowly.