Anything between about 80 and about 132 here; a hard limit isn't a useful requirement for most of the environments we work in. As ever, readability is more important than slavishly fitting lines inside some arbitrary limit; spilling a few characters over isn't going to summon nasal demons.

[Although I may need to consult the manual for EDIT /TPU on VMS to find out if there's some way to actually work on lines that have been marked as extending past the edge of the screen... Ugh. Sticking to an 80 character limit makes sense there!]