Well, not quite resolved. Most sites load but Opera has reverted to pre-incident behavior: Almost all sites load okay but (in my case) Youtube almost never loads.
Chrome does better. Maybe Opera is having some growing pains? Bottom line is that it's too frustrating to use now (December 2018).
@panosv Well that and imagine your bookmark bar has folders of bookmarks that drop down inf you click on them. You might have dozens of bookmarks under different subjects, some of them articles you want to read one day. So you drag them up and down the folder in order you want to prioritize them. Can do in Firefox and Chrome, but not Opera.