I was married for a long while - and I miss it. That said - she only weighed 95 pounds, so maybe not having to deal with king-kong in my bed helped.
I think that sleeping together (in the literal, dictionary sense) is the least together-thing you're doing as a couple, because you're literally not even aware of the time.
While I perfectly understand that each couple finds it's own way, subsuming being asleep to be like some sort of deep, nightlong, perceptionless coma is just incorrect.
• God I miss those night kicks.
One thing I've realized, though, is it doesn't make a big difference to me. We're both fairly deep sleepers though occasionally my snoring wakes her and she nudges me and I roll over. We also have a couple of cats on the bed, and when they were kittens I'd sometimes wake up and yell at them for scratching elsewhere in the house.
What I've realized is, despite waking up more often, I'm not significantly less well-rested. I only seem to wake to a cat pawing my scalp or my wife rolling over when I'm already in very light sleep anyway, so it's no problem.
But, I hear you.
I snore. It wakes my spouse up at night, which causes him to wake me up... sort of. I'm not always conscious of him waking me, but I will temporarily roll over. I sleep pretty heavily (and always have), so waking me is difficult. I sleep more poorly when we share a bed, and he most definitely does.
The best solution we've found is one of us going into another room. Earplugs help little: He still needs to hear the alarm. I cannot be trusted to wake to them with regularity (living on my own, I'm occasionally late to work if I work early). They have vibrating alarms for the hard of hearing that might work out, but I have not tried.
We still have cuddle time if we should choose it and still do normal "bed" activities. If we both sleep well, we are both happier during the day. The payoff is definitely worth it. We occasionally sleep in the same room if he sleeps earlier than me, using our own blankets (common here in Norway). Which again, defeats the point for some folks but is really great because we both stay at a more optimal temperature, keeping us sleeping better than sharing.
Been there. Done that.
After a sleep study, I started using a CPAP machine and it totally turned my sleep and life around.
For me, the sleep thing is something I've had since I was a child and isn't connected to the snoring. I have a later body clock than most folks. I was the child that refused to wake to open christmas presents and i've always slept soundly like this. My poor mother had to fight with me through school. I sometimes simply don't hear alarm clocks, unfortunately - which nearly disappears if I wake at 9-10.
As far as vibrating alarms go: I use my Apple Watch as my alarm. It's set to silent, so it just vibrates when it's time for me to wake up. For the most part, my wife is never aware of it going off. It's been a total game changer for me.
My wife and I went to a mattress store and tested out every mattress. One of us would close our eyes while the other got on the mattress and rolled over. When we couldn't tell when the other was moving we had our mattress.
It ended up costing like $3000, but if you can afford it I think that's a small price for something both of you will use literally ~30% of every day.