The point is that it's an equivalent workflow. It doesn't make the process of developing worse if you're used to those tools so why does it matter if it's 100%

The point is that it's an equivalent workflow. It doesn't make the process of developing worse if you're used to those tools so why does it matter if it's 100% local? We can assume if it's working for them then network connectivity isn't an issue (which is isn't for most of us, most of the time).