The TechnologyManager currently caches and serializes technologies that had been researched.
However the templates are never used, so looking up and caching the templates is wasted performance.
Serializing the JSON templates might make it easier to debug OOS issues, but we decided to minimize the data serialized (#3834).
Both AI and simulation have their ways to get the technology templates if they want it.
(The removal of the serialization will allow unification of tech getters in globalscripts, D1108).
See linked trac tickets and D1108.