The current situation does not look good. These major parallel efforts dilute a limited number of developers efforts. It creates far too intrusive alternatives on a far too low level.
I can live with in a world with two, five or or even 25 different spreadsheets, as they are end applications and don't necessarily inherit code from each other. Still, most distributions today have a Gnome one and a KDE one, for the wrong reason. Widgets...
Yes, I know the history behind both, and the C/C++ difference. But as both now have viable licences, the C/C++ is only a technical obstacle, in a world of engineers. Please, try to work for a merger.
It would be interesting to hear reasons for and against maintaining both.