You are absolutely right, during this long bearish season many many good projects died forever and some leave during the initial coin offer. The crypto market is unpredictable so far.
The bearish market will make altcoin scam and useless dead. But for good altcoins, I think it will still exist and grow, although the price can be dumped many times. I believe that in the future when the bull market starts, good and quality altcoins will surpass and grow like 2017.
in a bearish market it gives us a vision that coins can survive, although certainly the volume is not as good as during bullrun market conditions. projects that cannot survive will die and not have volume because they grow because of the hype not because of the pure platform they have.