You're not the only one. But most of the time "freezing" is related to hardware or the OS failure to execute a task.

There are many variables that could contribute to the "freezing" behaviour. If the server is 8 years old it's presumably near the end of it's life. Lack of RAM, hard drive failure, issues with a switch...Like Andrew said, the performance on any old equipment can become flaky.

But if the freezing occurs for everyone at the same time, it seems to me that it has to be the server and you would need to start your troubleshooting there. But if you're already replacing the equipment, it's no longer worth your time to figure it out.