I mean, it works, but that's irrelevant if Microsoft are listening to everything that's happening at the OS's end.
Pretty much this.
I've talked about this a couple of times before, and I'll quote one of my previous replies below with links to some interesting articles. Basically even with Windows 10 heavily customized to minimize telemetry and monitoring, it still monitors
way more than is reasonable.
I sometimes use Tails from a removable drive, but I wouldn't recommend using it as your standard all-the-time OS. Better to choose something like Ubuntu or Linux Mint. You can always set up a dual boot as well so you can return to Windows as needed if you can't get something working properly on Linux.
Even if you
turn off all tracking and telemetry features, Windows 10 still tries to phone home a staggering
5,500 times in 8 hours. The additional use of third party tools designed to stop this did help a bit, but these researchers still reported 2758 connections in 30 hours.
Other researchers have similarly found that
even when you disable Windows 10 features like Cortana, it is still logging your activity and sending it to Microsoft.