What might happen is you can’t run some version of Linux because of some bios setting and you’re left with no working OS on the machine (Even when it does boot fine from the USB, the installed one may not boot because of secureboot, legacy boot mode, or something else).
So when you finally do decide to take the leap, keep a windows ISO burnt into a USB around.
That’s very very unlikely to happen.
What might happen is you can’t run some version of Linux because of some bios setting and you’re left with no working OS on the machine (Even when it does boot fine from the USB, the installed one may not boot because of secureboot, legacy boot mode, or something else).
So when you finally do decide to take the leap, keep a windows ISO burnt into a USB around.