PMC 24 and Canalis Cambria two way floorstanders; What is the advantage to this design?:

I recently noticed several 2 way floor standers, in particular, the PMC.24 ($6000 retail) and the Canalis Cambria  at $5000 retail.  Pro-AC and  Spendor also offer a few 2 way floorstanders

Is there any advantage to a 2 way floor stander  to a 3 way system??

I am aware that less drivers and crossovers, and a slimmer cabinet "usually" provide better sound quality; However, the retail prices of the above don't seemed to represent "good value".

Thank you, S.J.