It’ll slip in a trouser or coat pocket 12oz in weight.
Aux in is not great deal breaker. I would wager most people have at least 2 headphones, probably over ears and in ears.
you need a 1/4” plug (on the dUg) to use the headphone out, and to use the aux in from your phone or whatever, you would need a cable to connect up. Instead of that cable a set of in ear headphones into your device and into your ears, loosely, can headphones over them bingo, no extra hassle for silent play on the fly.
Its exactly the same amount of faff
silent play at home, actually having done this, versus the headphones and aux in on an amp and finally into my USB audio interface into GarageBand, or PC DAW, the latter is the best for balancing the sound out and not blowing your ear drums.
Aux in is just one of those things, it’s no bigggeeeeee