> Every few years I use Anki heavily for language stuff (German, more recently Latin and Classical Chinese), up to 90 minutes a day, but I can never keep the workload under control, or my habits change, and give it up.
Well... yeah? I guess if you're a full time student or something it's fine but IMO if your review times exceed 5 minutes it's time to stop adding cards for a while.
I had the same problem when studying English. I just capped my review/new cards study time to 30 mins per day. Basically if you have too much cards to review your vocabulary hits a "plateau" until your workload becomes manageable again.
Well... yeah? I guess if you're a full time student or something it's fine but IMO if your review times exceed 5 minutes it's time to stop adding cards for a while.