Comment by freedomben

To really be useful (to me at least and a handful of others I've talked to) it has to have xlsx support or at least open document format. If you're not sharing it with anyone then csv-only is fine, but still very limited. This project is early days though so shouldn't be judged for a while, but I would heavily suggest not overlooking compatiblity support even though it's a nasty boondoggle.