Yes this is a thing and it’s been around for quite some time. If you’re trying to approximate TeX, you may also be interested in MathML.

I need to go lay down; I’m having flashbacks to the good old days of “XML everywhere for everything all the time”.

Try turning the phone to landscape mode before tapping the full screen button. It works for me in YouTube on Pixel 7a.

Excellent point. I had forgotten about this. I work for a non profit so I’m ok, but yes you should absolutely check the terms of the license before using. On the upside, almost everything is markdown files in regular folders, so you can fall back to vim anytime.

I don’t know if this will work for you, and I’m not sure if you’re only looking for TUI editors, but Obsidian has vi key bindings and a lot of plugins.

Disclaimer: I have not tried the vi key bindings in Obsidian.

Another one I use is vscode. It has a ton of markdown plugins and vi key bindings. It also has a nice preview window.

What are some good alternatives if it gets shut down? Preferably FOSS.

What do you mean? RedHat even used to come with an installer localized in their language.

No. The wrong timing parameters could definitively break your hardware.

To manage packages on the terminal, I personally like to use aptitude which has a nice visual interface to find, install, and remove packages. It also lets you resolve conflicts interactively. If you do not want a separate tool, you can use apt-cache search to search for new packages.

As is typical with Linux, there are multiple ways to do it. I found an article that outlines a few alternatives.

I switched to self hosted Piwigo after Flickr started threatening to delete my photos a while back.

It had an extension that let me import all my photos from Flickr. Not sure if that still works after they changed hands.

It’s very easy to maintain; just click the update button in the Web UI. And it comes with a bunch of extensions.

You haven’t lived until you’ve installed Slackware from floppy disks and compiled the necessary network drivers into the kernel by hand. Good times, but never again.