Speed and overhead are both areas that should get a lot more focus nowadays; the Github desktop app along with a ton of other applications are Electron / webapps, each one adding a number of always-active processes, complex and expensive rendering, script execution, and a ton of memory usage, which do add up over time. I mean a lot of developers will have two or three Electron apps open right now; Slack and / or Discord, VS Code, Notion, and a bunch more in their browser of choice.