I'm trying to quit nicotine again after a semi-successful attempt a couple of months ago, and I thought, if I'm going to go through withdrawals for this, maybe it would be worth it to quit caffeine while I'm at it?
Is it worth it though? Do the cons of a caffeine addiction outweigh the pros?
I don't think caffeine is your main problem here. Coffee does weird stuff to your stomach and the colas - diet or not - contain a lot of sugar. If you manage to quit this habit you will probably feel a big difference and it will be really healthy, but I think you would feel the same benefit if you switched to taking caffeine pills with water. (Don't do that, the pill form will make you use a lot more caffeine)
I can't speak for completely quitting caffeine, I've never even tried. But I can recommend trying to replace as much of your intake as possible with tea. You will very quickly be able to feel the difference, and that is so worth it.
Diet colas regularly have 0 sugar, beeing sweetened with artificial sweeteners only. They're still bad for you, it's not due to sugar though
I'm thinking I want a full month long detox of caffeine at the least, maybe even longer. But when I do go back, it will definitely be tea or yerba mate, and only when I really need it.