SAM was the best board set Stern has done. Solid as a rock. The occasional transistor where the hardest part is waiting for the iron to heat up.
I've seen way more issues with SPIKE, and the fix quickly becomes get a new board to fix it. In my opinion they built these boards right on the edge of their requirements. That way they go bad much more often, and Stern has a continuing add on sale as they are the only ones that can provide them ($$$).
But the factory is still pumping at full capacity and it's cheaper for Stern, so SPIKE wins.