Believe it or not, the APL world's changed a lot since then. I still consider APL dead, but there are strong signs of rebirth.
APL dialects April[0] and KAP[1] are improving rapidly, and my own offshoot BQN[2] has gone from prototype to a full language. All of these are open source and made to work with the Unix ecosystem. While the K language isn't as close to APL, ngn/k[3] is following a similar trajectory.
This year we created a Discord/Matrix forum[4] (bridged together) for array languages, which has hundreds of members and a few conversations per day at the slowest. The Array Cast was featured prominently here when the first episode aired[5] and is also worthy of note: they say they now have thousands of subscribers.
[0] https://github.com/phantomics/april
[1] https://github.com/lokedhs/array
[2] https://mlochbaum.github.io/BQN/
[3] https://codeberg.org/ngn/k