it's hard to say whether they'll last 4 or 5 winters, but in summary these are mostly throwaway construction and the most likely failure is either (1) it gets well used and the upper eventually falls apart (best case), (2) the boots work for a while but the TPU sole delaminates from the rest of the boot, or (3) the TPU itself rots and disintegrates.

I don't know this boot well enough to say how likely 2 & 3 are, but I will say that people generally have a higher opinion of blundstone when it comes to this kind of boot.

if you want a truly BIFL boot for these conditions:

https://shop.whitesboots.com/all-boots/hiker/

https://nicksboots.com/howard-boot-classic-configuration/