Right, but like you said, rotations are (generally) only a month long. There's always an end in sight, and the rotations will vary in hours. Surgery rotation? Yep, I bet that I'll barely see him. But a rotation in a rural primary care practice? He's probably going to be working 8 to 5. So again, I just feel like it's not a huge deal.
I worry more about interviewing for residency and residency itself, though again it varies by specialty. Still, I don't think that someone in a new marriage starting med school needs to have all this negativity dumped on them or worry about how much time they may or may not get with their spouse third year and beyond. I think everyone picks up communication and time management skills as they go along in first and second year that serve them well when things get tougher in rotations and residency. Hell, I feel like we learned a lot about our relationship just in the application process!
I know I'm a first year spouse, but I just get annoyed about all the negativity around medical school marriages. My mother-in-law (married to a doctor) was even told while her husband was in medical school to enjoy it while she could because he'd just divorce her after residency was over (they've been married for nearly 35 years, from M1 through fellowship and even 12 years in the Navy). People just say the weirdest, most unnecessary things, and they really don't help anyone.