Yes, if SiYuan stops being developed, you can still get your notes exported as markdown files. Since SiYuan is open-source, you can also use the internal code to parse the JSON format notes.
13 karma · joined August 28, 2022
User inertia is strong. Neovim has its success because of its improvement, but more importantly, the keymap and config language is based on Vim7. Vim7 users can painlessly switch to Neovim with all config preserved. That's the main reason why Neovim can gain a large number of users initially. Conversely, Helix has no keymap nor configuration compatibility with Vim or other mainstream editors. Given this, I see no hope that Helix will become mainstream.