Opera definitely needed a Tabs/Islands/Workspaces manager. With mass moving tabs, creating Islands/workspaces and all. Not just create/delete in side panel for workspaces and RMB menu/drag'n'drop for Islands/Tabs.
And all that should be saved in session localy. And user can be backup/load that anyhow (at least with copy'paste some files/folders).
After Islands disappears (yeah, this is still unfixed problem) I need regroup 2-100+ tabs on 24 workspaces. Each time... This is veeeery annoing.

Opera definitely needed a session manager. Or at least auto- And button- save current session.
Localy!
I am tired of random closing all tabs or at least delete all Islands on restart or update Opera..

Over a year Opera has Tab Islands.
Over a year Islands disappearing time to time. Sometimes with all opened tabs, sometime tabs stay opened (thanks, yeah...)
So, when Islands will just work without closing tabs or without regrouping all tabs from zero?