On the E190 you can select reverse as soon as soon as you have weight on the mains - plus two hamburgers (or elephants, thousands or whatever you count in). But generally I don't use reverse nor do I use Autobrakes. That's because I don't need the former and the latter system is poorly designed (in software terms). On limiting/over-speeds/contaminated/deficiency situations then of course they'll be used and also for practice. But when you have have such a slow approach speed, they are really just there for show.