I have never tried to become incontinent, but I'd be lying if I said I haven't wondered what it would be like to be an incontinent AB. For me, I think being incontinent would add a nice sense of realism to my baby-time and really lock me into that babyish mindset. I love using my diapers when I regress, but sometimes my adult subconsciousness and that mental block one gets from potty-training can make full use a little difficult. I can pee like a boss, but #2 is always a little hard to do, not impossible, but hard to do. I think full incontinence would be a good way to use my diapers fully without much hassle. So, yeah, I've thought about it, I think most people with an interest in diapers or babyhood have thought about what it would be like from time to time.
That being said, I don't think I want to be incontinent at the moment and I certainly wouldn't purposely try to become incontinent. I'm still reasonably young and I think being incontinent while not unmanageable, would be a big adjustment at this young stage of my life, it might also make my typical everyday life/activities a little more complicated and I have a full plate as it is. I also worry that being incontinent might make diaper wearing and baby-time less special for me, this probably wouldn't be the case as I am very accepting of my baby side, but I don't want to chance it. Furthermore, I am not in a situation where I can own more than 50 diapers at a time, I'd need to have a lot more money if I were to survive being incontinent, I just don't have the finances for it.
If down the line, in my older years I start to lose control and become incontinent, then that is fine, by that point it'd be natural and I would have the finances to cover such a lifestyle change, but for now, it'll just remain the occasional "what if" scenario.