That's correct. I'm presently a runner. I know my 5K PR time because it was run just a couple of months ago (and I'll hopefully beat it in tomorrow's race). Had it been a one-off marathon 20+ years ago, I'd be hard-pressed to remember my time unless I looked it up.
I’ve completed the distance 11 times in addition to a 40K, 50K, and a 50 mi. The 40K is technically not a marathon but if you add the warmups I exceeded the 42K (=26.2) threshhold. I also list it because it was perhaps my best racewalk performance in a national competition. My time was 4:03:15.
I have run three marathons. I can tell you that the pain of the last hour is something that you try to forget.