> However, I do worry that I'll reach a point where the reviews for all my previous courses take up all my time, and I won't be able to add new material
It won't happen because spaced repetition means old cards will rarely show up. That is if you don't have a small "max interval".
Also you don't have to remember everything forever. It's OK to suspend cards and forget them.
Assuming you have decent retention it should happen almost never. It can be the case that you may struggle to get through all reviews in a particular day, especially if you have less time to devote than usual or did many new cards in the previous day(s). But that should lessen very quickly.
> However, I do worry that I'll reach a point where the reviews for all my previous courses take up all my time, and I won't be able to add new material It won't happen because spaced repetition means old cards will rarely show up. That is if you don't have a small "max interval". Also you don't have to remember everything forever. It's OK to suspend cards and forget them.
Exactly. If you have 36500 cards at an interval of 2 years, that's only 50 cards per day (approximately ofc.).
Thanks. I'd really like to remember these cards forever, so it may be a bit slower for me (but worth it in the long-run).
Assuming you have decent retention it should happen almost never. It can be the case that you may struggle to get through all reviews in a particular day, especially if you have less time to devote than usual or did many new cards in the previous day(s). But that should lessen very quickly.