I don't want to attack these machines - they are what they are, but I think you're close in your estimation of them. I'm sure for light duty work they can be useful - probably more in the engraving domain, and that of soft materials. The mechanical build is slight, tolerance poor, and spindle capability limited (Ouch!, I'm really biting my tongue hard there). But they serve a purpose, even if that purpose is mainly to frustrate people who expect too much from the machines. The larger machines can be more capable, typically proportionally stiffer and stronger, but you're probably more realistic with your final costings if you're looking to get anywhere near to cutting aluminium (you mention that on your intro thread).

Of interest (for someone trying to declutter), you've identified a particularly small machine - have you a particular minimum build volume in mind?