With me having Dial Up, one of the features of the old original Opera that was monumentally important and Godzilla-sized helpful to me was the Extended Progress Bar. No other Browser that I know of has ever had it. With that Extended Progress Bar I could always tell immediately and at all times the status of anything that was loading, be it the loading of a site or a download of some App. I could see in detail whether a loading was going excruciatingly slow or fair or at the normal speed or even pretty much stuck in park. Therefore, I would always know more or less how much longer something was gonna take to load ... or whether it was time to pull the plug and abort a loading that was going nowhere.
All other Browsers that I know of, be it Opera 20, Firefox or Chrome, just have some circling thingy and extremely vague and borderline useless little messages as the indication that SUPPOSEDLY a loading is actively in progress. However, I can't know whether that loading is going along at normal speed, fair speed or possibly going along at 25 bps or locked up.
So yeah, I would sure be excited if the Extended Progress Bar was brought back.