Microsoft Issues about "NAV 5.0 runs on 64 bit SQL"

From Partnersource: 1.https://mbs.microsoft.com/partnersource/downloads/hotfixes/nav40w1_xpndo64bit.htm?printpage=false
This release makes Windows login possible for Navision running on SQL
Server 2000 or 2005 - 64 bit
2.https://mbs.microsoft.com/partnersource/documentation/systemrequirements/navsqlcommunication.htm?printpage=false
Information about how Microsoft Dynamics™ NAV functionality works
differently on SQL Server 2000 and SQL Server 2005, and the known issues we
have.

However one currently couldn’t buy 64 bits runtime licenses from the
Dynamics pricelist until sometime back. That was suppose to change and I am
not sure if you can buy the 64 bit runtime licenses now.