Any updates on JMeter for Appian?

According to  [mention:650c85e52fdf47f29168a7d381b7feb7:6b577b8c04704e209d29b6772bf67243:label=Leverage%20JMeter%20in%20Appian%20Load%20Testing%2C] this plug-in  [mention:a056532754bb4d848e4bc838433a0ebd:f7d226abd59f475c9d224a79e3f0ec07] is needed for, or at least greatly streamlines, performance testing in Appian. The app is now unavailable, and a comment on the plug-in page notes that it is out of date. Is this plug-in permanently out of support, and consequently, is that a showstopper for using JMeter in Appian Load Testing? What is the latest guidance?