I think that the only serious problem is that Android kills apps all the time, so that's something that add-ons would have to handle. But in reality most add-o

I think that the only serious problem is that Android kills apps all the time, so that's something that add-ons would have to handle. But in reality most add-ons worked despite that (by going through insane hoops you could still install other non-supported add-ons).