I cannot overemphasize how dumb it is to allow your isp to see what you're doing.
So the best solution is HTTP+HTTPS on the server and using HTTPS till it inevitably breaks (for legal, technical, social, or other reason), then the HTTP is there to keep things accessible. I'm not anti-HTTPS. I'm anti-HTTPS-only. And you should be too if you care about human persons over corporate use cases.