I say having spent the last weekish frustrated that my printer seemed to just be awful at making prints with even loose tolerances all the sudden.
I was using filament that had been left out a month or two, so not long at all, so I thought. Killed the rest of the spool trying to tune things, prints worked perfectly when I got a new spool out.
Goddamnit.
Old filament doesn’t care what printer you use since the filament is basically foaming due to water content when heated in the hot end.
That said, the surface finish of parts on my old i3 clone wasn’t that great. I also never really had problems with wet filament. I have a new printer with much higher quality surface finishes, so I suspect it will be easier to see defects caused by wet filament. So far all is well though and I haven’t changed my old filament storage habits (opened, sitting on my basement floor).