I use paste extensively for work, where syncing to iCloud is not allowed. Even allowed, I wouldn’t necessarily enable it due to myself using paste app on my personal devices under the same iCloud account.
Hence requesting a feature to export the paste history to a file of any format that would allow an import on a new machine. We do need to change laptops every so often in a coporate setting :) .
Alternatively, having different workspaces which I can allocate devices to or select on demand will also work, when iCloud sync is allowed.