"Windows needs to restart" is among the most universal annoyances. Here's how the modular kernel changes this.
Why Restarts Have Always Been Necessary
Monolithic kernels are tightly interconnected and loaded as a single unit — patching safely has generally required a full reload.
How the Modular Kernel Changes This
Project Cobalt divides subsystems into independently loadable modules — a networking patch can apply without touching anything else.
Microsoft's Cited Estimate: ~60%
Roughly 60% of monthly patches affect only a single isolated subsystem and should become live-patchable.
What Still Requires a Restart
Deeply interconnected core changes and major feature updates will likely still need traditional restarts.
Enterprise Implications
Could meaningfully reduce planned maintenance windows for routine patching.
A Genuinely Significant Change
Possibly the single change with the broadest universal positive impact — no new hardware or learning curve needed.