Thinking through design for a new OS and I think the concept of a text-only mode is completely unnecessary. Or, rather, it is just as optional as a graphical interface. Both of which can be added on top in user space. That then leads me to wonder what the purpose of a "terminal" is in this kind of system. It seems more like a REPL to quickly operate on the machine, but it is no different than any other program. As such, there is no reason for it to be text-based. Such a "terminal" could indeed draw fancy graphics without any issues.