My smart 1W thing is just coming into it’s 2nd winter and so far has been great.
It’s sited 1/2 up the seatstay on the RHS so it misses all the muck and spray and in in line of sight of drivers.
I cycle pitch black country roads and other people coming into work have often commented on how far away they can see me, I use the mega flare thing on flash and the small commuting LEDS on constant to comply with the highway code.
Don’t think the brackets have changed much as it’s interchangeable with an old smart rear commuting light I have from back in the day (and still works fine).
HTH