Because a modern OS is much higher fidelity and there’s limits to how fast all those components can load. You may not care about the newer features , or think

Because a modern OS is much higher fidelity and there’s limits to how fast all those components can load. You may not care about the newer features , or think you don’t at the least, but there’s a limit to how fast they can be loaded. More than just loaded, they’re also often checked for integrity as well.