Why ports for BETA tagged so late?

[Yuri]

7.0-BETA3 is very stable now.

But when I upgraded I have to have all ports recompiled on 7.0. There are no
binaries yet on FTP so I have to recompile all ports on my machine that takes a
lot of time.

Why port tree tagging is so late in the release schedule?

All ports compile fine at this time.
Many people can benefit from the earlier availability of binary packages.

Yuri