I stopped adding words only in 2024, when I was adding highly specialized vocabulary and sentences (political science, philosophy, etc.) and then deleted the decks only a few months ago. I liked Anki but I realized it’s only useful for getting to an intermediate level. Once there, it’s counterproductive since it takes time away from more useful activities like reading books.
I started in late 2013, so nearly 12 years. Assuming 1-2 hours per day, let’s say about 4,000-8,000 hours. Probably closer to 8,000, especially after factoring in travel to Japan, conversing with Japanese friends and family, etc. Maybe even the legendary 10,000 hours! LingQ says I’ve studied for 277 hours, which seems way too low.