Microsoft has realized and acknowledged that Windows users' default app choices are important for performance.
Default app RSS
The official Microsoft performance-boosting and clean-up app for Windows called "PC Manager" thinks a user's PC needs repairing if they choose to ignore Bing. But it's hardly a surprise at this point.
The Patch Tuesday updates for the last few months have quietly rolled out a new UCPD driver. This new driver by Microsoft is seemingly intended to block default app switches by Registry hacks.
The default apps that come on Windows 11, or Windows 10, seem to take up a lot more storage than you might think. Some deep digging reveals it can be more than 1.5GB of disk space in total.
Mozilla has circumvented Microsoft's anti-hijacking protections in Windows 10 and Windows 11 in order to allow users a simpler one-click process to change their default browser to Firefox, à la Edge.