There needs go be a balance. Common tools are useful, but you need to switch which tool you use from time to time as the old one gets stagnant (or bought out and the new owners raise the price too high).
Sometimes people change tools for the wrong reason. I've been in many companies that changed their bug tracker because the old one was too cumbersome, but they never addressed why all those mandatory fields were added to the old one, and so in a few years they learn the hard way and now the new one is cumbersome because of all the mandatory fields.
Sometimes people change tools for the wrong reason. I've been in many companies that changed their bug tracker because the old one was too cumbersome, but they never addressed why all those mandatory fields were added to the old one, and so in a few years they learn the hard way and now the new one is cumbersome because of all the mandatory fields.