Good question, I don’t know. If it is old shitty SSD you can exhaust lifetime write in days.

Just because it's a bad idea doesn't mean it wont be implemented.

Won't matter. Every home user could cancel every service, they got business users by the short and curlies.

I hear you, and also, the modern Labour group (Neo Labour, if you will), when they were created, revived the OG Labour ideals from the 1700s, and OG Labour was a spinoff from ex-Conservative members. The way Labour act only prove my theory that there have only ever been two parties in power

There might be but you ruined my quip!

Building a linux phone: do you mean from scratch, or just installing one of the Linux phone OS's that already exist? I've been following Ubuntu Touch for several years now and, while they have made a lot of progress, its main hurdles have the same thing in common: mobile hardware is incredibly locked down. For example, Ubuntu Touch uses proprietary Android drivers for many low level functions. Even then, there's some features that aren't stable across all devices, like VOLTE. It sucks, I really want to use Ubuntu Touch (or any of the Linux alternatives) but I can't make phone calls or text in the US without VOLTE support. There are a few phones that support VOLTE, but the feature is either in beta, the phone is expensive, or the phone is not sold in the US. Anyways bringing that back to Graphene: In my case, I'm using this as a stopgap until Linux phones take off (assuming they ever do). For now I guess the best thing is to just be skeptic, keep things minimal, and bloat-free.

I believe that's what a write down generally reflects: The asset is now worth less than its previous book value. Resale value isn't the most accurate way to look at it, but it generally works for explaining it: If I bought a tool for 100€, I'd book it as 100€ worth of tools. If I wanted to sell it again after using it for a while, I'd get less than those 100€ back for it, so I'd write down that difference as a loss. With buying / depreciating / selling companies instead of tools, things become more complex, but the basic idea still holds: If the whole of the company's value goes down, you write down the difference too. So unless these guys bought it for five times its value, they'll have paid less for it than they originally got.

Almost nothing is ever really done on any filesystem when you press "delete". The only thing is that those physical parts of the disk with the "deleted" file are marked as "not in use". The data is there still unchanged, until you save something else and that spot on the disk is the first free spot available for saving that new file. So, if you accidentally delete files, make sure that nothing gets saved on that disk anymore, not even by the OS. So, either unmount the disk, or cut the power to your computer, or whatever. Then learn how to mount hard drives as read-only and how to mark the "not in use" spots on your disk as "this spot contains this file". This is why proper deletion of files always includes filling the disk with random data. As long as nothing has been written on top of where the file was (and in reality: still is), it's still there. Only access to it has been removed, but that access can be regained. Been there, done that.