Interesting, but then they discovered nothing elsewhere, just that some Earth bacteria can live in arsenic.
Fairly weak.
What is interesting is that there is life on earth that is totally unrelated (no evolutionary conection).
This discovery seems to be another example.
“Fairly weak”
I would guess that anything that thrives in arsenic is fairly strong.
This is a good find, and expands the possibility of discovering life in places we never would have considered looking at.