probably the immunity / essence upgrade
I am somewhat sad there is still no fix whatsoever to item slots, though
it's just unfeasible to hit rank 65 with fishing as it is right now, without trashing like 30% of your fish at the high ranks (even in a well)
this is what I'm on about btw:

edit2: the last case at 69 probably never happens due to there not being any level 60 fish, but the one at rank 64 would, meaning you have to throw 3 full tiers worth of fish, and 3 of 10 being 30%, so I guess I wasn't that wrong with my initial statement
edit3: if it cut off a tier every 10 instead of 15 ranks, the issues would start occuring at rank 64
This post was edited by Dante on Sep 28 2020 12:13pm