I think the 5.7 is a total hype job. Its ballistics are not much better than 22 magnum. This is a gun for collectors who already have 2 of everything.
To me, it’s all about cost and utility. I’d rather have 5 SKS’s than one super duper battle rifle. Ditto the CZ-52. Quantity allows you to cache some, or “arm up” friends who may arrive unarmed.
I have a CZ-52 too - great buy for the money. Another one that I like even better is the CZ-82 in 9mm Makarov. Very accurate and dependable, 12 round capacity, good size for concealed carry. Glad I have both!