> *but we don't recommend you use it beyond 40m and may degrade over time.

Worse than that. It was tested and as soon as you pass 40m, it gives a warning, stops displaying the depth and just tells you ASCEND. Once you are above 40m it functions again but the No Decompression Limit is no longer reliable, as it doesn't track the actual depth you were at, while >40m.

That’s entirely reasonable, 40 meters is the limit of recreational diving.

Anyone going deeper would be doing tech diving and would need to be using a proper dive computer.