you don't have to participate in races that take longer than you're ok with . I too prefer the endurance races that are less than 12 hours, but I still play the 24h ones just because it feels good when you're done.I voted yes, but endurance races should not be longer than 2.5 hours, anything longer than that is overkill.
I think we should have a 24h race for spa, nurburg and la sarthe, and also dozens of shorter ones. When the endurance is just 2-5 hours, it's not really a drag to have a lot of events with different rules and limitations. 4 hours of rwd on wet tracks, 4 hours of MR cars at night, 3 hours in a pre-1970s car (no 2j!), 400, 500, 600 PP limit endurances, anything, really. Designing these races isn't a lot of work. You've already made the stuff that takes a lot of effort to make, this is just mixing and matching what's already in the game.
Accelerated time is a decent idea, but when a whole day is compressed to 24 minutes, that's too extreme. On Nurburgring, you don't even get a single lap in the same kind of lighting. You start in the morning and after a single lap it's already nearing twilight, what's up with that?
24 hours compressed to 4, 6 or 8 hours would have felt much more "real".