I find myself agreeing with this. LibreOffice is de-facto a superset of everything that OpenOffice provides. There is no benefit to keeping these two brands alive and diluting mindshare among non-technical users who now have to be told "OpenOffice shouldn't be used, go with LibreOffice instead", which confuses them.

I think it's far better that the two projects merge and go the way of the GCC fork reunification [0] - one should remain standing as the brand, the other be folded into the main codebase. A few years ago I would have said that the remaining name should be OpenOffice, since it's more familiar and less awkward to pronounce for some English-speakers. On the other hand, Libre seems to be gaining some recognition of its own these past few years, so it's less clear-cut now.

[0] https://gcc.gnu.org/wiki/History#Reunification