There are a few reasons:
1. People expect more functionality, and that requires more processing power
2. Fancier eye candy
3. Spyware, or telemetry, or whatever else you want to call it
4. More background services are running by default
1. People expect more functionality, and that requires more processing power
2. Fancier eye candy
3. Spyware, or telemetry, or whatever else you want to call it
4. More background services are running by default
Source: Worked on developer APIs for Windows Universal Apps. Those sandboxes don't come for free.
The telemetry gets bad rep, but its impact is almost non-existent. At least for the actual telemetry. There's some functionality crap, like Bing-search in Start menu, which slows user down, because it makes a web request. But that's an actual feature. Telemetry is just sent in the background, whenever CPU is not busy.
I suppose you are reffering to WinXP. /s