I fail to imagine a single bit of business software that cannot be achieved with open source software, outside of specific proprietary processes. But your average office technology work, I see being very plausible to move to open source. There is definitely going to be a breadth of quality across the tools, but the outputs can all be the same I believe. Even on a personal level, it's worth cultivating self-reliance on tools you control. But at a national scale it feels perhaps existential, worth what learning pains there may be. You also cultivate local software industries.