Spoiler
none of my A129 or A119S or A119 Pro or A119 Dashcams have failed and I create & test 100's of MODs at low & extreme Bitrates including A129 Duo with Rear camera connected at 33Mb/s and none have failed or even caused failed startup or file corruption. Many reported issues can be attributed directly to not Formatting new memory cards or not Resetting Defaults after update or card Brand/Type isn't 100% supported in Firmware yet or using Fake/damaged cards. I've been lucky using older Lexar 64GB TLC C10 U1, Samsung 64GB TLC C10 U3 and newest Viofo 64GB C10 MLC U3 cards with zero issues, considering I push the hardware beyond my own safe limits to prob the MAX i'm actually surprised nothing has happened. I did ofcourse modify each Dashcam by removing the black acetate tape over the cooling vents as shown in old Tips video #1. My MODs are very conservative compared with others, use at your own risk, and always start with 22-24Mb/s MODs since Viofo already uses these values.
About to post my A129 Duo 30Mb/s test footage recorded in snowy winter temperatures (not recommended for summer), just need another sunny day for the opening clip.
Need brave A129 Beta Tester for Color Saturation MOD testing. The current v1.50 Neutral color desperately needs a boost and the weather here is too cloudy for accurate testing.
One major point all your heat related posts are ignoring is very commonly skipped, higher density microSD cards actually get hotter adding to the overheating problem associated with running higher Bitrates and the main reason i've always used 30fps and smaller 64GB memory cards, 128GB cards get hotter, just eject one from dashcam and see for yourself. An interesting comparison is if 128 GB TLC 3x NAND chip cards get hotter (probably) than expensive 128 GB MLC 2x NAND chip cards.
Anyone reading this thread worried about MODs causing permanent damage must understand anything including running official 20Mbps firmware in HOT region in FULL sun or leaving Dashcam in Parked car with or without Parking Mode enabled will reduce the lifespan of the device if component temps reach above 70C or higher. That is even before loading MODs which do stress chipset in similar way as selecting 60fps instead of 30fps. Increasing the chipset/processor load increases heat as expected, exactly how much more heat depends on Bitrate levels, cooling vents (JooVuuX has almost zero vents, poor design & MOD was insanely high +38Mbs), interior & exterior temps and direct sun exposure.