> training every boot

except this should only happen _once_ (until you remove/replace components, reset the BIOS etc.). Which is why it normally doesn't happen for laptops, it was run once in the factory and DDR being soldered one mean they can just "fixed" disable the retraining avoiding bugs in the "retraining needed" detection

but yes, there are pretty bad motherboards out there, like the one I have turned out to be a complete shit show with multiple sever design issues I unluckily "lucked out of not running into" in the first 2 years of usage making a return unlikely and a replacement is useless as this is are fundamental issue affecting all models AFIK.