If you are an emacs user, you might be interested in org-drill, which of course is plain text and uses space repetition algorithm:

https://orgmode.org/worg/org-contrib/org-drill.html

W.r.t data entry I've resorted at times to using a Google spreadsheet with autogenerated row UUIDs (it's useful for content to have a persistent ID in case you have to correct a typo or add new fields).

I also often found myself wanting to make different flashcard decks from the same basic information (for Mandarin pinyin sentence --> character recognition, characters --> English translation).

If there was a sheets like data entry interface backed by a text format it would be great.l (I rolled things with streamlit but it's always cumbersome to get started).

Spaced repetitions only work if you use them every day with minimal or no breaks. If the algorithm actually does the recall probability very well like FSRS does, you will keep failing the cards if you don't do them consistently. I learned the hard way where I almost forgot like 80% of my spanish deck that I was certain that I will be able to retire and recall it. But nope, even that word that you felt was rock solid in your memory is gonna fade, so just trust the algorithm.

Self-plug. For anyone working in the terminal: https://github.com/krychu/lrn.

A very simple cli tool, consuming basic txt format. You can use it in a second window while waiting for your compilation to finish.

Recently I’ve been also experimenting with defining QA pairs in my note files (in a special section). I then use a custom function in emacs to extract these pairs and push to a file as well as Anki.

Know a big proponent of hashcards, has a setup[1] that's followed up by a prompt[2] that converts websites, pdfs, etc. into hashcards for SRS.

[1] https://www.zo.computer/prompts/hashcards-setup

[2] https://www.zo.computer/prompts/add-flashcards

I am always intrigued by new SRS systems, though sadly most are just "simplified" Anki clones. I have always been tempted to throw my hat into the ring.

The biggest area for improvement is probably deck collaboration. Most SRS proponents often state that its bets to make cards yourself because the act of making the cards is a key part of the learning process. I don't disagree, but part of the reason that making cards your self is recommended is because the shared decks are, on average, terrible.

After that I would like to see more built in support for non front/back or cloze cards. There are a lot of other card types that you can make, but are difficult or impractical to do in anki. Things like "slow" cards, one sided cards, code/music/math/text cards. These can all be done in anki, but it's a pain.

Then support for card order/hierarchy/prerequisite an and encompassing graphs like what MathAcademy does.

And lastly, a web first experience. Anki is offline/local first. That has the benefit that you are always safe from being rug pulled. But there are a lot of places (like work) where local first does not work well.

Markdown is the final perfect form for every text (non-binary) content based system.

Every product will eventually use markdown as their content store.

Thank you, finally a SRS implementation I can use for my plain text files. Very nice! I had Gemini make a deck from https://github.com/eudoxia0/hashcards , hashcard_tutorial.md and after correcting my deck to account for escaping the < and > with \< and \>; on the second run ($ hashcards drill --card-limit=10 ./)dealt me all the correct cards, like a self QA I really like the keyboard shortcut of space and 1,2,3,4 for making deck reviewing quick work.

This looks really cool. I thought in the past about implementing something like this myself.

I have use anki, and briefly mochi.

Having plain text cards that are simple to edit and manage with basic linux tools is really important.

I have used the genanki python library in the past to generate cards, but it's not great.

Going to give this a go.

For language learning I've found audio playback and images to be very useful.

Could you imagine adding support for this?