No, I haven't run a large IT budget. My career has been almost entirely spent working for startups and non-profits. The amounts of money that you are thinking of as trivial absolutely DO matter in those environments.
The makerspace that I'm doing stuff for currently is looking at having to replace 30 or more computers in October 2025 because they are systems that are not supported by Windows 11. We currently own 5 systems that ARE supported, which means that nearly all of our systems will have to be replaced. (Switching to Linux is only an option for a small number of them; the software that drives things like the laser cutters and CNC lathes is Windows-only, as are many of the things that people want to teach in our classroom.) Unless donations of older but supported systems (8th generation and later Intel, or or second generation and later Ryzen) become available by then, we're looking at an expense that we simply don't have the money to pay for. Having to go out and spend $20,000 or more on computers in a year and a half absolutely IS an existential threat to our existence; it might be trivial by large corporate standards but it's not trivial to us.
It's a mass extinction event on a scale that we haven't seen Microsoft do for a long time. Systems build in 2007 originally ran Windows Vista, but most of them have been fully supported by Windows 7, 8, 8.1, and 10. The ones that started with Windows 7 or later were even upgradable to Windows 10 for free. They will have had a supported lifetime of EIGHTEEN YEARS when 2025 comes along. But it's not only those admittedly ancient CPUs that are losing support; everything older than 8th generation Core (introduced in late 2017) will be unsupported. That's TEN YEARS worth of equipment that is suddenly becoming obsolete. Microsoft has NEVER dropped support for that many systems all at once, and the fact that most of them can be made to work on Windows 11 with a registry patch or other workaround (though there is no guarantee that will be true of the 2H25 release; those Core 2 processors from 2007 won't work with 24H2, you need to step up to at least the first generation Core i5 or i7 from 2009) suggests that there is no compelling reason to drop all of them. If they had adopted a more gradual approach, the pain level would be manageable; say, dropping three year's worth of systems now, and maybe another three years when Windows 12 comes along, and so forth.