jm |e+N©ðsW/´*õx®rì%Ô_(£áG-3LáL¤Even if BCH chain were to completely die, I think some people will still keep a copy of it around forever. Right now you can store the entire chain on a $20 drive.
https://whatsonchain.com/tx/0b0751ed3b9bcbac48a8141b5796ca2d49e339e7d50e31bc66dc7d727c1c9eaa