There are two issues with Modern brakes or 3, that can lead to greater pressure needed (or 4)
ONE: wore out completly. this also leads to grinding noises and higher cost of repair.
TWO: Glazing.. Easily fixed by a brake man
Three: Loss of assist system.. Expenssive
Four: Driver.. For 3 years I was unable to drive motor for mechanical reasons (IT BROKE) but it fixed and after 3 years of driving the car the MH brakes do indeed take more pressure.. i'm still adjusting to that (Been less than a year since I got engine replaced).
IF you are worried, have a brake man check 'em.
Older brakes had additional issues.