I have a server with 2000-3000 simultaneously AGI connections. All of this threads is blocked 99.99% of time.
Virtual threads will fit perfectly.

Suggest:
AbstractAgiServer

protected void execute(Runnable command) {
    if (useVirtual) {
        Thread.ofVirtual().start(command);
    } else {
        getPool().execute(command);
    }
}

But don't use threads for AMI Events processing because of high load.