I know NDBs will eventually all be gone but for some reason they're being phased out much more slowly than expected. I first discovered NDB hunting back in 2013 but immediately read about them being decommissioned by 2015, that was quite disappointing to say the least. Yet here we are in 2019 now and there don't appear to be many "no longer active" in the last few years as originally thought. William Hepburn's list is very detailed and you'll even find some that state "Back On Air" every so often. 365 kHz Guayaquil, Ecuador is an example, I heard it (and still do) but didn't see it on his list and sent an email. He said that it was thought to be decommisioned but they came back on.
Even longwave broadcast stations are not completely leaving the air like it was expected. Algeria and Morocco show up here often in winter, and last year I logged Monaco on 216. There are a few other European countries still broadcasting on longwave which make a good DX challenge, though they may not last as long as NDBs.
Thank God radio experimenters are now allowed to use longwave, it's become my favorite DX band.