Again, it's just personal opinion. I understand that those who have come through the industry and have been taught that paint is the best will be pro paint, and similar with those with vinyl wrap. I have been involved in both and personally like vinyl wrap.
Agreed.
I have used both extensively and have had far less issues with polyurethane. We have never used any of the cheap vinyl suppliers only the top end companies.
The issue with ordering a new vinyl door comes if that colour is no longer available or the new batch has slight colour differences. Vinyl like laminate comes in a limited amount of colours and if your particular colour isn't that popular then the supplier drops that colour in favour of another.
With polyurethane it can be colour matched and resprayed at any point in its life without issue. I agree that yes to colour match a door costs more than buying just one vinyl door.