@andrew84 I read you "mission" correctly, but your post is being read by Opera users speaking native languages, like me, other than English. Common English used by the world isn't good mean to communicate nuances for us (for me too). In those cases I prefer to express myself verbatim, adding "written tags" (sarcasm, happy, sad, irony etc) even, or describing issues pointing to essential details.
Semi sessions option in Opera evinces through Save all tabs as Speed Dial folder RMB context menu, but it's primitive. Workspaces are wonderful, but Session Manger working with workspaces is what would make Opera the King in the world of web browsers. There are some other features which Opera should pay attention to, but I write about it in a post defining and explaining Operathon idea. Opera badly needs it, I'm sure.
[Fig. 1] Read my comment/request to what to change in the screenshot is here