Not really. It all boils down to personal preference. 95% of my brews go straight from primary to keg, so I have a habit finding solutions to processes that are typically done in secondary that allows me to get the same result without secondary. Vanilla at packaging is one of them. I am also not one to drag out the primary fermentation any longer than necessary. When I brew this recipe it's grain to keg in 10-14 days, which is typical with most of my brews.
Another example is an imperial stout that I kegged last Sunday. I brewed it exactly 2 weeks prior. At kegging, I added homemade vanilla extract, cold brewed coffee, and cacao nibs (bagged) to the keg. I'll likely pull the nibs or CO2 transfer the beer to another keg this Sunday and then let the brew age in the keg for 6 months. Essentially, the keg is my secondary, but I'll be serving from it when the time comes.
Kegging opens up a whole new world of process options that I can use to my advantage.