I recommend watching tennis before 2004. I can infer you've started watching tennis somewhen afterwards.
They're all baseliners.
2009? You're surely joking.
i've started watchi9ng tennis in 1991, which is probably a bit before you started watching yourself.
They were all net players, if you generalize the today players as all baseliners.
Except Agassi, Courier and Chang, they were all net rushers, now the exceptions are Llodra, Stepanek and let's say Lalo/Melzer.
It's the same spread of styles, except they now play more on the baseline and before they played more at the net.
The main difference, for which i would have some nostalgia toward the old days is the fact that there were more players having a single handed BH compared to now.
But that's coz i'm playing a single BH and i prefer players doing so, otherwise the tennis today is hundreds of times more interesting for me, much faster, less errors, more tactics, more athleticism, less vulgarity on court and much more affordable to watch.