Currently you can only select 50 apps in either Block or Allow mode. For me this isn't enough either way:
Block mode: there are way more than 50 apps I'd want to block
Allow mode (what I'm using): I can cover most of what I need, but there are still some apps that are crucial to always have access to and aren't ones I'd ever spend significant time on
Example: the Royal Mail app. I'm never going to be on there unless I get a random notification saying my parcel's being delivered and I need to reschedule because I'm not home. I don't want to have to unbrick for that, because every time I unbrick it opens up the temptation to go on other things. Plus, if I'm not home/near my brick, then I'd have to use an emergency unbrick.
The 50-app cap forces a choice between leaving genuinely-needed utility apps blocked, or unbricking (and exposing myself to the addictive ones) for tiny one-off interactions. Defeats the purpose.
Surprised this hasn't been raised yet — would love to see the cap raised significantly or removed.