[Al-Khwarizmi]

I guess it depends on how you use the system. I know you learn more if you make your own flashcards carefully, but sometimes the perfect is the enemy of the good. I am using Anki to learn Chinese vocabulary with a huge preconstructed deck that I downloaded, I've been doing this slow but steady for over two years, and it's working wonderfully, at least IMHO.

Of course it's hard to know whether other alternatives could have worked even better, but this way I devote 30 minutes a day which can be on the bus, in bed, etc. and make progress. If I had to spend the time and involvement of making the cards myself (which requires not only more time, but in practice a more dedicated setting with a PC and keyboard, etc., as I'm not going to make flashcards with my phone on the bus even if it's technically possible) I would probably have quit a long time ago.

So work on making the creation of flashcards easier seems like something that could be of interest at least to some people.