Is this news? This is expected, it's what they did with 7 and XP after those reached full EOL, which happened on the day they said it would for 7 at the time 7 launched, and a few years after the date they said when XP launched.
The 2025 date has been known since 2015 when 10 launched and is the standard Microsoft ten year support cycle for operating systems.
And yet, in spite of this, every single time the tech media published these breathless and shocked articles about how horrible it is that Microsoft is suddenly dropping support for their ten year old systems.
These articles are like clockwork. I'd say we'll be getting them for Windows 11 in about seven or eight years, but they have a new "modern" lifestyle they've adopted for it that's more based on last major update release or something and it'll probably come sooner than that this time around.
Although I generally agree with the sentiment the problem here is that most computers can't be upgraded to windows 11 and that pretty much never happened before.
Generally I would agree with you, as the 10 year lifecycle you described is what's to be expected. With Windows 10 however, Microsoft said on release it would be the last Windows and they move to windows-as-a-service. So Windows 10 not being the last Windows and the upgrade path being closed by default for many older PCs is newsworthy.
Microsoft never said that, though. One person said that and tech media ran with it like it was gospel (and Microsoft didn't correct it, which is absolutely their fault, but still, that was never an official statement but apparently something that was just poorly phrased)
It's different this time because of the tpm + other requirements of W11.
In the past it was never a big deal and people who didn't upgrade from xp or 7 could be labeled as luddites because MS provided an easy and even free upgrade path.
But for the first time ever, anything older than 7 years isn't supported.