I think this plays a role in the difficulty of the migration, because yes, the interface has changed quite a bit. In general, we tried to hew as close to the ol

I think this plays a role in the difficulty of the migration, because yes, the interface has changed quite a bit. In general, we tried to hew as close to the old paradigms as made sense. We never changed anything just because we didn't like it; we tried to make sure that the transition would be easy and the users didn't have to drastically change their mental models. But of course, there are always going to be differences in look/feel/capability between native applications and the web. I will say the web has come a long way since I started as a web developer 15 years ago and it feels like closing this gap is more a priority these days. But there were parts of the application that were poorly designed (our users told us so...) and so, even though they were the primary ones driving change, there's always pain when changing to a new way of doing things.