I'm pretty sure I read about taking 10 and 20 in the playtest as I've only played 5e before this and hadn't known that rule before. Now I cannot find it, even using the pdf. Peculiar, recall it mentioning couldn't be in a situation with critical fail option, fairly certain picking a lock was the example, and there were requirements for 10 v. 20, like not in a hurry so not able to use it in combat. Now I'm vested if figuring it out.