The cause is very likely just mundane - phone cord manufacturing supply chains disintegrated as landline phones themselves disappeared, so that kind of cabling just isn’t economical anymore to scale for commodity use. Deviating from standards is expensive.





FOSS clones for software just to work on closed overengineered standards is stupid. We have had markdown for decades but still prefer oblong zip-xml files for writing rich text and slides!? Absurd.
Excel is the only MS Office product that makes sense to exist, and thus carries the brand to dominance largely by itself. Docs and slides have already been solved; I wish devs just focused on making the perfect Excel clone and abandon looking at all other MSOffice programs.