I’ve been using Anki for 10+ years. Over time I’ve slowly accumulated 10k+ cards in my main deck, all manually created. I try to review every day, but inevitably slack off when the day is busy.
Now I have a TON of overdues, and will probably never catch up, but it’s fine because 98% of my cards are mature.
However, there’s one problem: when I add new cards, they’ll never show up, unless I set my daily review limits to 9999. For this reason, I’ve reverted to using v2.
As I mentioned, I create all my cards manually, and I do it when I come across things to remember in life. The best time to review this type of new cards is immediately after I create them, because that’s when I’ve just encountered them in life and the memory is fresh.