After a Windows update I'll always check if MS has helpfully switched Telemetry back on.
As well as also checking Inking, Tailored Exp, Diagnostic data etc. I do wonder if it is all futile as they clearly state that they will collect some diagnostic data that you cannot switch off. For
'only your own benefit' of course. MS is one of those rare companies using the internet, who confusingly spend their time and money on stuff that is not for their benefit but for someone else's who they do not know, or particularly care about. Even Notepad now sends data back to MS it does appear! Which is why it has been deleted from my PCs.
In much the same way that many sites ask you to approve cookies because they care about your online safety. They care that much about your privacy and security, that they clearly state they will send any data they trawl off your device to 670 other altruistic companies for them also to store your data safely onto servers at their own cost and for no actual benefit to themselves. You know it makes sense
Some like Anti-virus companies will tell you in their T&Cs that they '
will' upload your address files, emails and other data. As well as retaining a record of every program you use and website you go to.