Yup my PS1, PS2 are still going strong, albeit looking very old now. I had the PS3 die, but had it replaced a day or so later at my doorstep then was rock solid until the day i sold it and PS4 going strong.
I had my 360 replaced 2 times, Brother had his 4-5 and my other one 1-2 times to which kind of says something. In the end they ended up increasing the warranty as the consoles dying were happening way to often.
I think their method of cooling is perfectly fine, modding the case like that will help one section but make the rest worse as it's messing around with the way they cool.
No idea on the collective years but PS1 had during the second year, PS2 the same, PS3 the same and PS4 from release.