https://www.imagemagick.org/Usage/anim_opt/#removedups
And right above this paragraph is a dope technique to use overlays and a non-dispose of frames to make the gif only change which pixels are being updated (like a video format I guess).
This might sound pretty complex, and sure, That's fair, we are coming up on 30 years since an update to the format. People just generally use videos these days for desktop recording since they're more suited for the job, at a even lower filesize
Out of curiosity, any idea what formats you'd choose to embed in a Github readme? Videos or otherwise, I'm not sure which play well when embedded, and are GitHub allowed, etc.