[zalthor]

You can always boot from your mbp? Treat it like an external bootable storage system. Yes you won’t be able to use the display on the laptop, but you will be able to run your applications on the iMac. (Assuming that matters more? For me it does. I can’t stand how slow docker is on my mbp, pretty much puts my cpu to 100% and has the fans running at full speed)

[eklavya]

I wanted this so much. Turns out that doesn't work with encrypted drives which is mandatory. Target disk mode only allows booting in non encrypted drives or perhaps non t2 MacBooks.