Comment by spit2wind

I find it sad that APL nowadays means Dyalog. They appear to do amazing work. Unfortunately, the license isn't open. Why would I invest time learning it only to be locked in? I wonder how much licensing plays in APL not being more popular and used in the present day. There are open variants, like GNU APL2 and J. However, GNU APL2 has none of the advancements made in the past 40 years and J is J, not APL. The notation is simply different.