Is television an insecure industry?
You are referring to the replacements in serials. Well, you may think that they have become common parlance, but the fact is that this is a misconception. Just because there are so many serials flooded with actors today, you get that feeling when you see one of the characters going out. But believe me; no replacement occurs for a flimsy reason. Like, either the actor loses spark midway through the serial’ creates problems in allotting dates / arrives late on the sets / has too many difference of opinions with the creative / interferes in others’ work… it has to be something concrete. Television industry is just like any other office; you are finer as long as you do your job quietly, honestly and efficiently.