Why are you making a mod for features that are in 0.15?

You can better update than adding this mod.

My guess is he's still on 32bit and Factorio went 64bit only in 0.15/0.16.

32bit is dead, any computer made in the last 10 years should have a 64bit compatible processor so I don't get why anyone would still be on 32bit though.

this mod is for users who dont use 64bit systems and want to play with new features
i saw someone is playing 0.14 still

Ahh, I didnt thought about that.

So you actually make a patch for 0.14 with 0.15 (and mabey 0.16) features

yes
research tree is based on 0.16.22 version (somehow)