I think he meant as in things other than bug fixes.
r1972
Multiple packets are now sent to ghosting clients on each network tick, reducing ghosting and file download times
r1958
Reduced ghost lookup table size by ~10%
Brick limit replaced by $pref::server::ghostlimit - this setting puts a hard limit on the number of ghosted objects in the game and reduces the size of the ghost lookup tables accordingly.
$Pref::Server::BrickLimit checks replaced by getBrickLimit() - this function derives the brick limit based on the current ghost limit.
r1956
ParticleData framesPerSec value is now synced to clients
Sky object network update size reduced significantly
Brick movement is now camera relative when in free cam mode
Delete buttons added to save/load bricks GUIs
Added ballRadius field to projectileData, used to prevent sports balls from sinking into ground
Client disconnect/CDROP echoes now show player name
Increased maximum ghost limit to 1M, what could go wrong
Increased datablock limit to 8k, that'll be fun to download
You can now set individual player speeds directly using the following functions: setMaxForwardSpeed, setMaxBackwardSpeed, setMaxSideSpeed, setMaxCrouchForwardSpeed, setMaxCrouchBackwardSpeed, setMaxCrouchSideSpeed
All of these were this year, and I snipped out any bugfixes. It still includes general 'behind the scenes' improvements, however, the updates aren't completely featureless. I personally think r1956 was a great update.
You also started this year so it's not like you've been around for 'those big updates' anyways.