As a new (steam) player I was rather disappointed to learn about how much alts are used in the game, while we were talking about it in alliance chat today. One of the big reasons I came to Wurm to try it out was the whole idea of getting together and relying on each other, and working together towards a goal within a community. I have come to learn that its very common for people to tackle big projects simply by creating many accounts and doing it all alone rather than engaging with others.
I don't wish to try to tell others how they should play and if people want to play that way that is their business. I do think though that having that as a big part of the game would definitely hurt things socially. It also makes it more frustrating to me as a new player to try to find my place and value in the community when the veterans have their own personal alt armies. I feel that in my case it might very well be a reason that I don't stick with Wurm long term where I might have otherwise, though it's too early to say for sure.
I think it would be wonderful to at least have maybe a server available to choose where people who would like to be restricted to only one character per person (generally, I mean I know there is always ways around it, but close enough) can go and play there in that way. I really hope that is something that is offered sometime in the future.