A feature in Mastodon v4.2.0 that went unnoticed by me until now: DMs now highlight the fact that they're DMs.

Previously I always had to make a conscious effort to look at the icon to see if content was public or not. Now it goes out of the way to make you aware if a post is a DM. Nifty.

https://static.noagendasocial.com/media_attachments/files/111/135/074/787/260/265/original/41dcb5c1f9f69c07.png