I camped full time for 2 years in a truck camper with a cassette toilet. On a few occasions I wished I had a large black tank and could go a long time between dumps. On way more occasions I was happy I had the cassette toilet. On the downside I need to dump every 2-3 days, but dumping is easy. I try to avoid dumping at crowded public restrooms. I would never abuse the privilege of overnight Walmart parking by bringing the cassette into the store. I have dumped in outhouses pretty frequently. I have used side entrance gas station toilets on rare occasions. In some States I have found rest stops with free dump stations. Most often I just use campground dump stations. Only once was I in the middle of nowhere and had to improvise by digging a hole.
Whether cassette or black tank, dumping is no fun. At least with the cassette it is quick. Also no disgusting contaminated dump hose to deal with.