I still occasionally do this, but really only for things that are personal to a PC that I think they may not share. Of course, it's super easy to do for me, as we play on roll20 and use TeamSpeak, so it's a double-click to enter a different channel on the TS server and have a quick sidebar (I keep these very short) and pop back to the main channel. I've done this, let's see, about 3 times over 30 sessions in my current 5e game (and never in my current Blades game), and every time the player kept the info to themselves. All for strictly that PC personal things, mind. One may affect the game much later, but if it does it won't be a surprise by that point -- lots would need to happen and none of it secret.