i was for a while too. but the shift back to aluminum does not bode well for caseless.

deep scratches are trivial and drops will immediately lead to heavy dents. that being said the screen itself is incredibly tough so it will be usable.

before (stainless / titanium) you could go caseless without concern. the most i ever had happen was a little crack on the back

The aluminum helps protect the glass - it absorbs the shock.