I agree there will be some around for many years to come especially NDBs. But even if there were none why would you rip out your ADF unless you needed the panel space. You can still tune in to AM broadcast stations if you are ever in a situation that you need to find your way due failure of GPS etc. Their range (especially the ABC) far exceeds any NDB. I know CASA will now be wringing their poor little hands at the thought because they are not approved nav aids but if lost at night?? Just be aware of fade out at night and double check that the signal is coming from where you think it should be,because sometimes they will relay the broadcast. Double check with other stations.Years ago during WW2 they used to plot there location off shore by trianglating the bearings to different stations.
And as a last thing they good for listening to the footy.