These boards are robust in the face of repeated rework.
I\'m not sure what the reason is but when I do antenna matching, requiring me to solder a tiny connector on and then do dozens of rework iterations to find the right parts, some other boards fall apart more than others. The copper just delaminates; this happens on the RF connectors, which experience a lot of torque. And it happens after replacing an 0402 a dozen times.
I have not experienced this problem with the US protos from PCB UnRating:
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