One disadvantage of custom written software?

Custom written software can have several disadvantages compared to off-the-shelf or pre-packaged software. One of the main disadvantages is the higher cost associated with custom software development. Custom software is usually developed from scratch to meet the specific requirements of an organization or individual, which requires significant investment in terms of time, effort, and resources. This can make it a less cost-effective option compared to off-the-shelf software that has already been developed and can be purchased at a lower cost.