atm we have up to 5 days. I think after 1 year and then every year up to 4 years the planet should get an additional 10% bonus . So a planet 4 years old will have 140% bonus.

+1

+1

makes sense, +1

I like the idea but it's quite OP the fact that a nice 2 year artifact planet could get an extra 20% bonus is OP tbh with you. It's like another type of profession that gets 10% research/artifact/mineral bonus every time the planet gains another year. +1 if it could happen, but -1 for the OPness.

+1 if the effect only applies to common planets. definitely overpowered for anything invincible.

production bonus is not that much , i dont think its over powered.

I saw a two year rifted dyson that pours out over 9100 ap/h, adding 20% bonus on that planet can give the owner over 10k. It's like adding another planet artifact that give 10%-20% bonus without taking any space or a permanent effect that can give the owner and his/her planets a nice boost of artifact, mineral and research per/h on their production.

for you its probably a 10% boost to total production.

then you take a good rift and start throwing thousands of time vortexs on it.....

Another reason why it's OP.