I think the exchanges that want to be reputable need to have a defacto standard inplace.

No new coins unless criterion A,B,C are met.

What those criterion is I do not know but I hope it more than a mineable coin based off the bitcoin codebase

Linux if you are developing any and all bitcoin services

I am surprised how often the alt coins put Windows releases first just to get a sugar rush of adopters.

GPU mining when it first became available while at the same time writing bitcoin off as neat little experiment.
The wallet.dat has been reformatted down at least three separate times.