What I find really offensive, which my Mac likes to remind me of regularly on the energy usage side of things, is the siloed vats of excrement that JavaScript, Browsers and Electron have enabled. These are absolutely horrible to use compared to native applications and each one has its own ozone hole above it. If I don't open a browser or Electron app my battery lasts 2x as long.
I do the occasional bit of Swift with XCode just for fun and to concentrate on that case really does disservice to the real elephant in the room above because at least Swift is not burning the universe to the ground and recompiling bits of it every time you click something. When you're done it's native.
Edit: personal wastage shitlit: Lens, Discord, Teams, Slack, VScode. VScode gets a pass as it doesn't annoy me as much as the others.