Is it okay to change potting soil of potted plants?

[scottischicken]

Is it okay to change potting soil of potted plants every six months because the label on the bag of potting soil says that it only feeds up to 6 months? Will changing the soil put the plant into some sort of shock? Or will the plant easily adapt to the new soil?

 

[rosemarythyme]

In most cases you can, though some plants don't like being disturbed as much. But wouldn't it be 100x easier to just add fertilizer as needed rather than replace the soil?