I mostly use my large iPad Pro as a secondary screen with Sidecar when traveling. For this, it's excellent.
I've used it for some minimal coding via Codespaces or SSH, which was fine, but as a development machine, the 13" MacBook Air is a way superior choice.
I've used it for some minimal coding via Codespaces or SSH, which was fine, but as a development machine, the 13" MacBook Air is a way superior choice.