I think that it wouldn't make sense to be honest... Coal Generator = Use coal. Also, all coal variants are also able to be used (coal, coal blocks, charcoal, charcoal blocks, and compressed charcoal blocks).

Now, I will say, if they add logs to the bioreactor, I think that is reasonable, because sure sticks and wood variants can burn in furnaces, but I would think that logs would be the only one added, because irl, processed wood is not really used in furnaces and other stuff, because of the chemicals used to process such materials. So, in reference to that, I would say add logs to the bioreactor, instead of the coal generators.

Also, this would keep coal generators from becoming too OP, and add more of a use to bioreactors (which end up becoming hidden by the other types of energy generating machines.

Well, logs were added to coal gen, along with slabs and such. That's why I proposed the suggestion.

Due to Phoenix's last comment I'll have to updoot the suggestion for consistency. Otherwise they should all be removed in my opinion lol