--snip--
4. You can buy regular USB storage drive and install Tails (or other Linux live distro) by yourself.
It should be noted that Tails OS doesn't save data by default after the user's session (in principle, like any Live USB), unless permanent data storage is enabled. Therefore, seed phrases of wallets that the user works with should be saved separately, so as not to lose access to the wallet contents.
And if you save data in storage, should not forget about the "fragility" of USB as a data carrier. Simply put, it can fail at any time and the data will be lost. Therefore, need to make backups.
Good point. Although i expect people who decide to use Tails would bother their documentation or at least read short explanation of how it works[1]. Electrum advice you to backup 12 recovery words, so most people should already make at least 1 backup.