Yes, they started the restriction a year ago. For a future reference, here’s the announcement about the restriction (written in Japanese): https://support.misskey.io/hc/ja/articles/7604557294607

Yes, fenced code block with specifying langauge may work as a workaround.

```text
systemctl --user cat emacs
```

but I said “inline” explicitly.

lemmy-ui: Highlighting some words blindly in inline code is really annoying. For example,

• systemctl --user cat emacs
• pactl load-module module-switch-on-connect

Our software is built on the reasonable assumption that third party servers cannot be trusted. For example, we cache and reprocess images and videos for you to view, so that the originating server cannot get your IP address, browser name, or time of access.

I hope Lemmy also implements the image/media caching in the not so distant future. Currently, Lemmy Web UI sends a lot of HTTP requests to external servers like imgur. (Github Issue)