I've bought two PCs in the last couple of years.. the new computers seem like they boot to the OS login faster than my older PC (built in 2012) can get through the POST. I still experience frustration with software not responding quickly enough, but I believe a lot of lag in modern software is due to unnecessary graphic animation which is somehow meant to make the user experience feel more "smooth and polished". The reality is that the fancy button animation takes longer to run than the actual program function takes to process and delays the user. I feel this is especially true with software for mobile devices.