I say, definately unless you really aim for long racing. I am 50 and don't want to or bother running with that heavy feeling after running approx an hour. Of course this is to some degree trainable, but I want to feel good when I run. I do just 45 mpw, but do 2h of cross-training cycling so it counts in time as if I did approx 60. I have for several reasons ended up doubling every working day since I can find time and opportunity for a lunch run and to run late in the evening. This gives me many benefits:
1. I avoid getting stiff and the discomfort of running for a long time, still I get the volume
2. I feel great after training, also I feel often very good on the second run since I get nicely activated from the first run
3. I can do more workouts a week and still recover, by doing double workout days twice a week. I have also done the same volume in one go and there is no problem in doing that so splitting seems to be giving the same as not in terms of workout endurance.
4. I can recover between first and second run
5. I think I might recover a littel bit better by doing several easy a day than one longer easy.
I felt in the start I used a lot of time on training, since it takes more time, but I have come to enjoy the great feeling after a lunch run that keeps me energized, can concentrate better, feel soft and nice in the legs, etc.
I very seldom run more than 60min, but I do one weekly "long" session in that I start by 30min cycling and then run for almost an hour to simulate running being more fatigued, but not getting that beat up feeling in the legs.
So I recommend trying this for 3-4 weeks and see for yourself what you like