@lcamtuflcamtuf
For illustrations and diagrams, much like the ones you've shown.
@stargirl did an excellent 'KiCad schematic -> png` plugin so I don't think I need to draw schematics any more (I had a janky perl + cairo based thing that did that).
If you have a fediverse account, you can quote this note from your own instance. Search https://chaos.social/users/ChuckMcManis/statuses/115914661244517565 on your instance and quote it. (Note that quoting is not supported in Mastodon.)