Ask HN: What old, discontinued desktop software do you still run?

What are your reasons for running it?

Is it because you've never found a superior alternative?

Is it because you know it inside out and it's the fastest way to do a task?

Is it because it runs fast and with low-memory requirements?

Or is it because it has the best interface for what you need to do, and it's never been bettered (in your view)?