Steven here, I’m one of the co-founders of Fledging. I know this is a bit of a necro-post, so my apologies on that. Only just recently found this thread, and wanted to make myself available to the dialog.
(Super) short version, JohnAtl’s experience was a part of a manufacturer defect that we’ve been able to root out the cause and fix. I have a more in-depth technical post in JohnAtl’s thread about his experience with upgrading his MacBook’s SSD, just don’t want to cross-post or cause spam. Feedback from communities like this has been an essential part of our design process since the beginning, so thank you all for being a part of this.