I've read before that "every IC" should be decoupled. I've never before bothered on gates, buffers, etc. No datasheet that I've read for those chips has ever suggested to do so, until I came across a TI buffer chip that suggested putting a cap across power and ground. That got me wondering if that's just common best practice anyway?
Should I be putting a cap between every VCC/GND I come across, no matter what? Or it just isn't that important?
Specifically I wonder then why, for example, a buffer 14-pin almost always has the VCC and GND chips on completely opposite corners. If it was the design intent to decouple it, shouldn't they be adjacent?
My experience tells me it can't possibly be that important, since I've never done it and I have devices operating reliably for years in the field... but always looking to improve.