@ConnyDuck Even though I am used to top nav now, I think there is something to be said for bottom nav bar for purely logical reasons. The way a phone is held makes it simply more accessible if it is at the bottom, and I could see myself getting used to that and enjoying the improved access.

However, this point is negated simply because you can swipe to switch between the tabs, so perhaps it's better to keep top nav the default to not annoy happy users and keep bottom nav an option.