Living it 
If you come across a place that meets your needs in every other way, but doesn’t have run ins, I would not cross it off.
My current location has pasture board without run-ins due to zoning restrictions or some mess.
We do have a relatively mild climate, although these last two winters have been a bit rough! But, quite frankly, our situation works far better than I could have imagined because of the diligent care provided by the staff. We’ve moved a lot over the years and I’ve never seen higher quality pasture board. The horses are pulled out individually, every morning, fed along the fence row, and checked over. They get appropriate blanket changes in winter, fly masks and spray, etc, in summer. This arrangement does require owners to be willing to provide an adequate wardrobe for their horse and keep it in good repair. The barn owner quietly provides additional layers when necessary bc an uninvolved owner doesn’t maintain good blankets or when a blanket has been ripped or needs re-weatherproofing.
This also requires that the horse owner and barn manager be realistic about which horses are well-suited to living out, but I’ve been very impressed at how well even relatively vulnerable types have done (older individuals and TBs who want to be lean, for example). I didn’t expect this set up to work as well as it did.
If it’s a nice place, it’s worth looking into. Go look at the horses living out; they’ll tell you if it’s working or not. Good care shows.