Ok, here's an example for me... I have found one commercially available wheat sandwich bread that doesn't require me to drive far out of my way, or cost $6 for a tiny loaf. This one bread does not contain dairy or eggs, but does have added D3. It also tastes like crap.
(I have spent literally hours in all the grocery stores near me reading labels.)
Dark rye appears vegan, but I don't like rye. Or potato bread. Gross.
I am too lazy to make my own bread constantly, plus I don't like homemade bread for everyday sandwiches.
So I have gone back to eating bread that contains dairy.
If there was a bread that was identical to Pepperidge Farms German Dark Wheat or 15 Grain Whole Wheat, just minus dairy, I would switch. I just haven't found anything in my area (believe me, I've looked), and am unwilling to eat bread I don't like or give up bread totally.
I posted my frustrations about this here and on Facebook. People offered a few suggestions, but none were practical or available to me.
I do make my grilled cheese sandwiches with Daiya Cheddar Shreds, and use Vegenaise instead of mayo. But for now anyway, I'm going to continue eating bread with dairy.