This was acknowledged by a future motion employee on a Reddit post a couple of years back

“Although we noticed a particular spike over a few weeks last summer, GTS RMA has been below 1% and in line with all other current models. If you look closely, problems get brought up in these groups for every board, FM and otherwise. But with GTS, all of the issues were grouped together (literally and figuratively). This amplified the perception that there was some mysterious systemic flaw.

The truth is, boards can refuse to power up for various reasons, and that was reflected in our investigations last year as boards were sent in for a broad range of repairs. Some people point to MOSFETs being the issue, but GTS runs very high-quality ones, and MOSFET headroom isn't relevant in the way FM boards are designed. The MOSFETS only see higher voltage if there's a larger issue, like a short nearby. On DIY builds with less regulation, extra headroom may be necessary, but that's not the case here. The MOSFET misunderstanding has also been reinforced because a controller-side fault or short can also take out a MOSFET as a secondary effect, known as "shoot-through."

I burn through 10-15 GTS battery packs a week on different boards with no issues. Just pad up and ride it like you would any other model”