I replaced the bridge on my Ibanez semi (replaced it with Gotoh GE103B-T), so I replaced the tailpiece mainly to color match the bridge. Stock bridge and tailpiece started to tarnish after only a month of use. (Luckily, all the other hardware works and looks great)
Same as with the bridge, I reused stock anchors. I was too lazy to pull the old ones out (and also was affraid I might damage the finish)
Gotoh feels more solid than the stock tailpiece, and the workmanship and looks are superb.