Everything we're working on now runs on our own infrastructure or muni-infrastructure. Nothing white-label in the works, although I wouldn't count it out (we're an ISP, we like to provide service, we're pretty open about how we get it to your house).
I have done all paper, all EMR, and a combination of the two. The combination is the worst. So far paper alone is the winner for most situations, although even crappy EMRs have advantages over paper. Most of the problems, as I see them, come from the general baggage of enterprise software (not sold to the people who use it, likely focus of dev time is on accounting/billing stuff I never see) and an attempt to slavishly emulate paper in digital form.
Possibly, but probably outweighed by the flexible nature of the zoning system, where more is allowed for a given zoning classification and there are fewer classifications. i.e. developers probably end up dealing with the zoning bureaucracy and politics less than they would in the US.