Agreed. We have a composting toilet at a remote cabin, and it works great. No muss, no fuss, no odors, just rotate the bins a few times a year and dump the dried mulch.
Now imagine eight people using that toilet every day all year long. Imagine that household is in a city of 200,000. All that poo is never going to compost fast enough. This new type of toilet is for high usage and high adoption rates. It could turn a total cesspool of a city into something clean. A composting toilet in every home in the same scenario would just result in mountains of barely degraded poo at the end of every street.
But the toilet discussed here also has solids that need to be collected and disposed of. Composting toilets come in varying sizes, and properly maintained, result in mulch as the end product, not mountains of barely degraded poo.