Thanks for the callout! I dug into this and you're right — there was actually a structural gap: food and gold both had a tech that boosted their production (Irrigation, Currency), but wood and stone had none, despite being the two resources almost every building and tech costs. I just added two new techs, Forestry (+20% wood) and Stonecutting (+20% stone), available from the start of the game. Should help them keep pace much better now — let me know if it still feels tight after picking those up!