My old ISP gave me only a /64. That's absolutely useless for doing anything more than there most basic of configuration. This seemed to be because of limitation

My old ISP gave me only a /64. That's absolutely useless for doing anything more than there most basic of configuration. This seemed to be because of limitations in their own infrastructure as they were using 6rd. I ended up switching ISP's to one that gave me a /48. I seem to recall general recommendations that ISP's assign at least /56 to customers?