I've known more companies start with utility pricing and move to "high touch" sales than companies move the other way. Companies don't
want to have that kind of sales process. They usually
have to.
Some of the mechanics of that is that if you're doing very large contracts, a lot of the software buyers expect things to be that way. For a lot of businesses, a couple expensive accounts are worth more than all of the small accounts put together. I've seen lots of companies start to disrupt a particular market with utility pricing only to fall back to enterprise sales when they realize that there's a reason everyone else in their industry does that.