Realistic number of hosts for a /64 subnet?

[Doug Barton]

On 5/9/19 9:27 PM, Doug Barton wrote:
> It's been a while since I was configuring subnets, and last time I did 
> the guidance was always no more than 1,000 hosts per subnet/vlan. A lot 
> of that was IPv4 thinking regarding broadcast domains, but generally 
> speaking we kept to it for dual stacked networks, equating an IPv4 /22 
> with an IPv6 /64. (This was commonly in office environments where we 
> used a subnet per floor to accommodate all of the desktops, printers, 
> phones, tablets, etc.)
> 
> Is this still how people roll nowadays? Have switches and/or other 
> network gear advanced to the point where subnets larger than 1k hosts 
> are workable? In IPv4 or IPv6? I've done quite a bit of web searching, 
> and can't find anything newer than 2014 that has any kind of intelligent 
> discussion of this topic.

Lots of interesting responses, thank you everyone.  :)