Resurrecting this thread because I ran into some development issues I have never encountered before...
I developed one HP5+ and one Tri-X today, both pushed to 1600 (according to the shooter's notes). They were loaded in two different tanks and stayed in there for 5-7 years, in room temperature. I took them out of their tanks and put them together with 3 more films: two FP4+, shot 3-4 years earlier but kept in the fridge, and a Pan-F which was freshly shot.
As usual, I didn't care much about specific times, so I put them all together in HC-110(B) for 9mins at 22c on a rotary machine. This is my normal technique for almost any B/W film, and I always get good results, properly exposed negs, contrasty and all that. I know this is not the correct procedure, but it works for me in all situations:
MF/LF portraits,
35mm street photography, anything.
This time, the three "new" films came out good enough, but the HP5+ came out thin, and the Tri-X came out even thinner. On the Tri-X front, we're talking "barely visible film markings on the sides" thin. All things suggest that my development was alright (although not the "proper" procedure

), but something was wrong with these two films. I have never encountered this in the many years I've been developing. I know that people develop "found films" all the time, and they get pretty decent results.
So, any idea what might have happened in these two old films?