Depends on what one is looking for. I'm considering upgrading to an M5 model because while the M6 redesign might come with some nicer specs, it's also going to be coming with some teething pains by virtue of having a new design. The M5 generation is probably going to be a speed bump with a chassis and screen that's a known quantity and has had the kinks smoothed out.

From that page:

> As a rule of thumb, Macs will not run any version of macOS older than the one they shipped with when they launched. Apple provides security updates for older versions of macOS, but it doesn’t bother backporting drivers and other hardware support from newer versions to older ones.

So the answer is “no”, they probably won’t be able to downgrade on the models that are about to be released.