There are certain downsides to Multithreading...

• 1 - Difficult to Debug: Multithreading code is difficult to debug in case of an issue.
• 2 - Difficult to manage concurrency: Due to multiple threads, we may experience different kinds of issues.
• 3 - Difficulty of porting code: It is difficult to convert existing single threaded code into multi-threading code.
• 4 - Deadlocks: In case of multi-threading we can experience deadlocks in threads that are waiting for same resource.