Do you really get it if you quit voluntarily anyway?
Yes! It was put into place when the company was young and couldn't afford pension/403b, and everyone was YEARS away from being able to qualify. Then, we grew up, started offering the more usual retirement plans, and wanted to do away with this benefit. BUT, by then, a bunch of people had qualified, and they felt like this made up for the years the company contributed nothing, so, it was kept.
I came aboard about 10 years later, and predicted they'd sunset it before I qualified, but that didn't happen and doesn't seem to be in the works, either.
Also, even $37k isn't very much money. If it was more significant I guess I might count it only to the extent of saying "if I left right now, would this push me over the edge to FIRE." That way you're not worried about policy changes, only whether the severance would push you over the line if you left right then and took the payment.
Right now, I keep it in my spreadsheet, but it doesn't contribute to the total. Guess I'll keep it like that.