[c-nsp] Why so many 'NOTE: This command is deprecated. Please use...'?

[Aaron Daubman]

Can anybody tell me, for my own curiosity, why so many of the IPv6
commands return the 'This command is deprecated' notice and suggest
the use of the exact issued command (as shown below)?

Thanks,
     ~Aaron

7206VXR#show bgp ipv6 unicast
BGP table version is 2, local router ID is 65.1.65.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 2001:411:3::/48  2001:411:2::2                          0 65265 i
% NOTE: This command is deprecated. Please use 'show bgp ipv6 unicast'

7206VXR#sh ver | i 720       
Cisco IOS Software, 7200 Software (C7200-JK9S-M), Version 12.3(8)T3,
RELEASE SOFTWARE (fc1)
BOOTLDR: Cisco IOS Software, 7200 Software (C7200-KBOOT-M), Version
12.3(8)T3, RELEASE SOFTWARE (fc1)
System image file is "disk2:c7200-jk9s-mz.123-8.T3.bin"
Cisco 7206VXR (NPE-G1) processor (revision A) with 491520K/32768K
bytes of memory.