I just got back from a week in Moncton, and was there a few weeks before that. (I flew both times, sadly.)
After the flood of Model 3s arriving recently in Toronto (I saw 10 on the roads in a week!), and the general ubiquity of Model S and Xs in Toronto, it is... discouraging to say the least to visit a place like Moncton where electric cars are very rare. I didn't see a Tesla even once during the times I was there. I'm not sure I've ever seen a local Tesla in Moncton.
I know there are a few owners in the Maritimes, but either through lack of education, lack of supercharging, or lack of wealth, I think it will be a long time before we see significant Tesla ownership in the Maritimes.
The GTA has about 5.5 million people. There was reportedly a shipment of 1,000 Model 3s alone in the past few months to the GTA. Let's be conservative and say there are only 1,000 Teslas of all varieties in the GTA (even though I'd wager there are probably 2x that amount of all Tesla models in the GTA, if there are 1,000 Model 3s). That's 1 Tesla per 5,500 people.
There are about 1.8 million people in the Maritimes (not the Atlantic provinces--we'll leave NFLD out of this for geographic reasons).
If there were 1 Tesla for every 5,500 people in the Maritimes, there would be 327 Tesla owners there. I don't think you could drive around Halifax or Moncton without seeing some of them, if that was the ownership rate.
I think I saw one (other than me) in Halifax once but it was not local. I know there are a few owners south of Halifax. Someone posts here with a username Moncton S85 so...
But Presumably the HRM, with a population of about 415,000, should have 75 Teslas if it were tracking GTA ownership rates. Moncton, with a population of about 70,000 should have 12 or 13.
Could Moncton have 12 or 13 Tesla owners and I just missed them all being there for weeks at a time? Maybe.
Could Halifax have 75 Tesla owners and I've never seen a local one there? Less likely.
This is all just a very long winded prologue to me pointing out that, sadly, I think that the superchargers planned in the Maritimes are for:
1. enabling visitors to the Maritimes
2. PR (so Tesla can say they have electrified another country, coast to coast, and can ease potential buyers' range anxiety by removing another limit to where they can vacation, whether they ever plan to go there or not) and
3. encouraging people in the Maritimes to buy Teslas
in that order.
If Tesla was basing supercharger build decisions on potential sales in the Maritimes, I predict we would not see superchargers there in any predictable time frame.
I think we will never see local charging at the chargers planned in the Enfield area.
I think the chance of more than 3 or 4 people--even travellers--hitting these charges simultaneously is quite low and will likely only happen occasionally.
I doubt 8 chargers are needed.