Could this work as an amnesic Qubes?

Qubes-Whonix
1

Would this work?

Install Qubes onto USB Drive then boot up setup all vms update everything and power off.

Then plug writeblocker between USB-Drive and USB-Port boot up and once done turn off and no writing changes to the USB-Drive have been done?

Only ever boot without the write-blocker to install updates preferably from a different network only ever used for updates.

Could this be a workaround to the last thing Tails is superior in (amnesia)?

2

That’s an interesting idea! Actually a Qubes, not Whonix specific question. Please ask on the Qubes mailing list:

https://forums.whonix.org/t/what-to-post-in-this-qubes-whonix-forum-and-what-not

3

Just wanted to note that USB drives with hardware write-protect switches are available. These really ought to be standard equipment for any techie…