Cassettes are horrible switch to a composting toilet
This falls into the range of "there's an ******** for every seat". I, personally,
prefer a cassette toilet over composting.
Given the nature of our use, the length of our trips, etc., a cassette toilet works best
for us. (Note, we use a "porta potti" style cassette, not the kind that has an installation portal in the RV.)
With the family being me, my wife, and daughter, the nature of the places we visit, and all trips <15 days in length, with multiple weeks of
non-use in between trips,
plus our typical mix of liquid vs solid waste, there would be zero advantage to composting. Most trips would not be conducive to the composting timeline (you'd be dealing with un-composted solid waste at the end of short trips), and we'd have to deal with the separated liquid waste
at least as often, if not more often, owing to the volume of that portion.
With a 5-gallon capacity Thetford "Curve" model, on a normal trip (during which some portion of restroom visits are done at gas stations, restaurants, etc.), we've gone as long as two weeks before
needing to empty the tank. Typically, I will proactively empty the tank after ~1 week if there's a convenient vault toilet or the like at a trailhead, or if we land in an established campground. About 75% of the time, our trips are short enough that the tank just gets emptied when we get home at the end of the trip.
Emptying (either in a vault toilet, or at home) is less of a big deal than most folks make out (certainly, changing a baby's diaper is 1000x less sanitary). The only concession we've made for ease-of-use at home was to install a handheld bidet sprayer in the downstairs bathroom, which facilitates easier rinsing when I'm cleaning the tank for storage between trips.
I also like that we have minimal consumables, and that I can pick up extras at any RV store or Wal-Mart along the way. Technically the Curve will operate without any chemicals except water, but the enzymes make everything easier to rinse clean, so I keep an extra 4oz bottle of the tank liquid in the truck (enough for two additional tank volumes), which takes up less space than the 2nd roll of TP. Aside from dropping in one of the "extra foamy cleaning" pod things a couple of times a year, I've got very little other maintenance.