If you want to use, then it's your decision and for any future mess, you will be liable for that. And also note that it's not the feature that available in A but I am talking about the security that global firmware has (Though lollipop but has all security built in, and no bloatware which I like most).
Anyway it's your wish, may your wish brings you the happiest moment you want. Wish you Happy New Year 2018