Dunno about the new ones, as I gave up on Class-D 10 years ago, but back then, while all nice and fine at a first glance, they obviously lacked resolution. They simply ignored low level signals. The dynamics is there, open and fast, but the background was always too black and highs were "simplified" in lack of a better term. Some think "jet black background" is a quality, but it isn't. It actually comes from ignoring low level signal.
I must emphasize, I don't know what's been done in the last decade, but I never got a wish to try them again, as I believe that this is inherent flaw of PWM that has limited signal dynamic range (whatever their S/N ratio may be). PDM (pulse density modulation) should be better, but manufacturers don't really tell whether it is PWM or PDM or something else, so I don't want to make "blind" purchases just to realize it's flawed and chuck it in the darkest corner of my listening room to never turn it on again.
While we're all throwing around Class A, Class A-B terms lightly, like we know how they will sound, at least it's some reference for making a choice.
With Class D designs, there's equal number of different modes of operation, but it's not advertised as such, it's all dumbed down.
I would surely like to know what methods are used to chop the signal and control the pulse width, frequency and duration, so I could try to make a choice that is not based on believing the sales pitch laced with latest buzzwords, but on actual information.