Most likely from halving the number of SSD chips and no longer striping. Though to be honest in day to day use, I only notice SSD speeds when transferring/load

Most likely from halving the number of SSD chips and no longer striping. Though to be honest in day to day use, I only notice SSD speeds when transferring/loading video files in the tens/hundreds+ of GBs. Otherwise, as long as the latency is low and the machine can load applications quickly from the disk, I never can perceive the difference. And with M1/M2 machines being able to start applications significantly quicker than my intel apple machines ever could, I'm not sure I could tell a perceivable difference in day-to-day use. But I am still disappointed that they are not using faster SSDs.