(Same person as above but felt that this part had a separate purpose so I've moved it into its own comment)

The ecosystem is currently such that it seems hard to enshittify it. They say they have no intention of doing that and I believe it, but their vision of a healthy and good product might involve a fair price (for rich countries at least) whereas it was always free so far

Time will tell; it sounds like there's currently no plans either way, but it's also simply open enough that users can always just install the open source software and share decks with each other by whatever file transfer/sharing means. Everything that's already there won't simply go away. I'm going to keep using AnkiDroid and building the language deck I am working on