I am going to answer as simply as possible. The biggest consequence is language insecurity. Ms. McLaren referred to this. Francophones show up and request a service in French. The person in front of them answers, more or less. We know what people usually do then: they immediately switch to English. That is the biggest consequence, obviously. People simply do not receive service in French.
We are talking about criminal law, but also about family law. Delivery of services should not depend on demand. The decision in Beaulac was clear on that point. The courts must be institutionally bilingual; it has nothing to do with demand. In these circumstances, if we really want people to use the service, it has to be available.