Does changing mining algorithm(SHA256) of bitcoin cause any side effect? One example is bitcoin gold change SHA256 to Equihash, does it cause any side effect?

Edit:
To be more specific.
What should participants of bitcoin blockchain, especially coin owner and miners, need to worry about when they take part in(e.g. trading, mining) a forked bitcoin blockchain with different mining algorithm?
Apart from GPUs being more viable for mining, no, there isn't. (And asics being less viable, or more or less useless..)

Apart from maybe a difference in difficulty etc, but blocktimes and blocksizes should be the same.

(Unless ofcourse they changed it in the hardfork itself, but that has nothing to do with the mining algorithm.)

EDIT:

Note: I've answered this question in technical terms, not economic/emotional terms.