I love the new Travel mode feature, but I have a suggestion on how to improve your implementation of Travel Mode.
Currently, "Not Safe for Travel" is marked at the vault level. When Travel Mode is turned on, all the vaults marked as "Not Safe for Travel" are removed from client devices. I have found this design to be less than ideal. Specifically, I use Related Items a lot. For example, my credit card item and the bank login item for that credit card are both cross related. Unfortunately, if I try to move those 2 items to a "Not Safe for Travel" vault (which I believe would be a fairly common scenario), I am given an error message because items with links cannot be moved across vaults. My only choice is to remove the links, move them to the "Not Safe for Travel" vault, and then re-link them.
I believe a superior design for the Travel Mode feature would be to allow users to mark items "Not Safe for Travel" at the item level rather than the vault level. This could be implemented very easily via a "Not Safe for Travel" (possibly reserved) tag. This design would allow users to keep all their items in a single vault if they choose to (my preference) or spread them across multiple vaults, and since tags are searchable across vaults, you could easily identify which items to remove from the local client when Travel Mode is turned on. This alternative design would give users more granularity and not require them to create a separate vault for "Not Safe for Travel" items.
In addition, the migration to this new design would be rather straight forward, as implementation of the new release could easily take all the vaults which are marked as "Not Safe for Travel" and add a "Not Safe for Travel" tag to each item in that vault. This way, users could still keep all "Not Safe for Travel" items in a separate vault, or intermix them with items in other vaults, or just keep everything in a single vault.
I hope this makes sense to you, and hope you would consider a re-design of the Travel Mode feature to provide more granularity and easier management of Travel Mode for your users.
1Password Version: 7.8.8
Extension Version: 2.1.7
OS Version: macOS 11.5.2