@xlad exactly, Workspaces are definitively more like chrome windows than tabs i agree.
to use another analogy workspaces are like folders, if u put everything in them u wont be able to find what u need that easily (even if u have multiple folders for different things) need when u have allot of files inside them so what do u do? u create sub folders to sort the things inside the main folder to make it much easier to find what u are looking for.
i am a bit of a hoarder when it comes to tabs so i have hundreds of tabs open at this time (probably over 1000 total on chrome atm), i want to switch to Opra GX because of its ability to limit how much Power/CPU/RAM my many many browser tabs are using to help my computer handle things faster and have a much longer lifespan (granted my last PC lasted 15 years) but without the ability to group tabs together i would need to have like 30+ workspaces to sort everything out properly so i can much more easily find what i am looking for as to appose the 4 different windows i have open in chrome that has 28 current tab groups and even then i have allot of tabs that aren't sorted so image what i would have to go through if i didn't have those easily found 28 tab groups, it would be impossible to find anything if i didn't so that's why Opra GX needs this feature, just because some people don't need to use it doesn't mean that there aren't people who do need it am i right?.