For those of us knew to SMAC/X, could you advise which unofficial patches are pure bug-fix patches.
Kyrub's patches don't add any features (besides bugfixes) to the game other than AI improvement. Yitzi has begun including bugfixes which I would consider to really be modifications but I don't personally consider the modification extensive at this point to be of worry for anyone who might not want modifications.
Scientt's patch is the only one that tried removing the unit limit, but you could probably install it if for some reason you don't want the AI improvements. Your game would only crash at 2000+ units on the map. Seeing as there were recently a lot of people using it, it's entirely possible you won't run into this.
I believe all of these patches are just EXE files. There aren't any installations.
If you want or don't mind AI improvements, and want bugfix SMAC, get Kyrubs patch.
If you do not wants AI improvements, Yitzi's SMAX patch is built on Kyrub's SMAX patch, which only has improvements to terraformer AI.
Scientt's foundational patch for SMAX, which all the others are built on, is outdated in bufixes and also has no AI improvements.
Has the GOG vanilla version been updated since Kyrub's fix (to include bugfixes)?
Is it still necessary to apply unofficial patches (for bugfixes)? I know SMAC works (I have completed it), but I have yet to beat SMAX; I don't want to install SMAC-only updates that will clobber the sequel.