I use TiddlyWiki via TiddlyPWA. It’s an offline-capable PWA with a very quick sync capability. It works beautifully on my phone and desktop. It doesn’t have folders, but it does have nestable tags, which works really well for me. I don’t think it supports markdown out of the box, but I’m positive you can find a plugin for it. Plugins are crazy simple to install; you just drag and drop a link into you wiki tab and confirm installation.
Thanks for pointing out Ladybird. It’s a pretty exciting project. But the author isn’t early in “announcing” anything. This isn’t a press release. He posted on his own blog about a pet project. That’s what the web is supposed to be. Not everything has to be for a big purpose or compete with everything else.
A one-man project starting from scratch is not going to be viable in this day and age.
It’s a pet project; it doesn’t need to be “viable”.
I think this attitude is part of the reason why we have so few browsers. Every time someone tries to start their own browser, even just for fun, a lot of the response is just bitching about how big and complex browsers are and how the effort to start a new one is wasted. It makes it so that people interested in writing their own browser (for fun or profit) are less likely to share about it and probably less likely to pursue it seriously
In the southern United States, we have biscuits made with bacon grease and sausage rolls, which are just rolls with ground sausage baked into them.