No effect at all. Apple is unlikely to make this possible, and given the sandboxing of Apps on iOS a meaningful version of this for local resources outside of the App are prohibited.
Agreed. There are some basic terminals available on iOS/iPadOS though, with ssh and other capabilities, but I can't speak to how productive one could really be with them. I wholly expect to see a version of Xcode released on the iPad within the few years, though.
I use Blink[1] to Mosh to an EC2 instance where I use Jekyll, Vim, and Git to edit a static website that’s built and deployed when I push master. I can transfer images from my Photos library using the local shell, which I then resize on the VM.
I’ve heard people speculating about “Xcode on iPad within a few years” since Swift Playgrounds was released. Hopefully it’s closer now, but I’m still skeptical.