They won't ship to the following countries: Afghanistan, Cuba, Russia, Timor-Leste, Belarus, Laos, Samoa, Turkmenistan, Bhutan, Libya, Solomon Islands, Yemen, Brunei, Mongolia, South Sudan, Chad, Papua New Guinea and Syria. Also, the offer is not available worldwide. Microsoft notes that the USB stick shipping may take 6-8 weeks.The number of flash drives is limited. They have to create the bootable media manually, say by downloading an ISO image, or using the great third-party service 'UUP Dump'. The user will receive a clean USB stick without any data. So users now have an option to request a free USB stick to make a bootable media and reinstall the OS in order to join a different channel than Canary.

Looks like sending free USBs is more simple solution for Microsoft rather than inventing some new channel transition mechanism for Insiders. If the user still wants to return to Dev, Beta or RP, then he needs to completely reinstall Windows 11 on his device. However, Dev channel users were forced to switch to Canary without the ability to return to Dev. Playing with bleeding edge features can be interesting, but some may be unhappy to receive builds that didn't pass even a small portion of tests. They may include critical bugs that lead to data loss and affect your workflow in a bad way. The builds in this channel include raw portions of untested code, experimental features that may never reach even the Dev channel, and so on. The idea of the new channel is to provide access to early implementation of various features. The new Canary channel now exists in addition to the previous Dev, Beta and Release Preview update channels.

Microsoft win to usb