That one zoom extension is very good. Site & page specific zoom settings..
With Opera's default zoom it would be helpful if at least the zoom would be in always visible and easy to reach location.
So that one extension is good with features & reachability - but like so many extensions it has Google analytics in it... Can't we even zoom without spying??
This and many more reasons it would be good to have basic non-troublesome functionality from get go - by the browser.