I can see both the pros and cons of this set~up.
The pros would be of course, if my husband had a snoring problem and I needed to get a good night's rest, esp. if I worked the next day. This would be a true God send. Also, I am a night owl and if my husband liked to fall asleep early, I could watch T.V. in bed or read really late w/out worrying about keeping him awake.
The downside to this set~up to me would be lack of intimacy. I
personally enjoy falling asleep in my husband's arms every night and the feel of his warm body close to mine. After many years of sleeping together, I just get used to it.
However, to each his own.
If it works for a couple, then I would never ever judge.