I had a 360 for 6 years rarely had any issues.
But I've had my ps4 since launch and really haven't had any issues as well
Same for me on both accounts. I had a lot of issues with PS3 when I first started using PSN and have had very little issues with Xbox Live over the years. However when it comes to my PS4 I have not had a single issue with PSN yet. I must be one of the lucky ones.
I had a slim ps3 for maybe 2-3 years, and one day it just had peoblems reading a disc which might have been my problem becuase I probably played skyrim for a total of 16 hours in 2 days, so that's why it probably started malfunctioning. I bought a super slim, have no problems, vita, no problems, ps4, no problems