I bought a behringer mixer that has main and aux outs. I send both outputs to my studio monitors, amp or PA. BIAB output goes to main and my playalong goes to AUX.

This lets you play along in realtime, and it offers some other advanatages too. You have knobs to adjust volume for each part. If the mixer has effects, you can add an overlay of reverb to everything to smooth out the slight differences in sound inherent to real tracks, MIDi and your own playing,

This is a solution you can implement today without having to wait for a program change.