I take issue with the argument that they are not environmentally friendly. (I can see that the CoCos don't like them, and do not provide for them, but that is not the same thing.)
Waste which is macerated and goes down the pipes is all within the council's control and can be fully composted at a council facility, in th same way as sewage (yes, they do process it with a view to use as fertiliser). Therefore the issue here is that the council is not investing in the technology to process it.
The alternatives are (a) Put in bin, which results in fuel use by trucks to bring it to landfill, where it may release methane on decomposition.
(b) compost at home which, unless done with correct aeration, also produces methane, and may encourage rats;
(c) compost correctly at home, which lots of people do not know how to do.
Only option (c) above is truly environmentally friendly. I have an insinkerator and I will contue to use it, in the hope and expectation that the cocos will eventually keep up with the market and invest in the technology to allow this organic material to be re-processed in an entirely environmentally friendly way, using NO FUEL for transport (via the pipes)