Look how many jobs in the private sector also require a security clearance. Most things in aerospace, but also a lot of enterprise/cloud/telecom computing will have a “federal” arm, and they need cleared workers for that. Amazon, Google, AT&T, Verizon, Microsoft and many other big names have divisions that do classified work. They pay a premium over regular positions because the clearance is a PITA for everyone involved.
Not in Windows 10/11. You can still “eject” if it makes you feel better, but it’s basically redundant. They reworked the support for removable media so they are always ready to remove except during active read/write operations.