Heraldofi

I'm having exactly the same issue, though I'm starting from pretty subpar hardware and 20-30 second saves was my starting point. I'm up to 2 or more minutes between loading screens, and I've noticed the dimmed or black screen before loading is happening for longer, and longer. It wasn't something I noticed consciously until after acquiring my 7th companion, and I noticed a distinct spike between acquiring the 7th and 8th companions, as I got them quite close to each other.