[like Thermal compounds on Thermal machines]
Add custom nbt tags to allow the creation of custom upgrades based on src/main/java/net/p3pp3rf1y/sophisticatedcore/upgrades without need to code to add custom

Example create stack tiers with custom sizes only adding on any item {Upgrade:{type:"stack",proprierties:{tier:24}}

I can only see this applicable to stack upgrades really because they seem to be the only ones who don't expose one of their properties like this. I guess I could potentially do something like this for them, just don't see a huge reason for that unless you have ideas for how this would be useful / what is being blocked by current state.

I agree that can break too many stuff without any good reason and it was why i only specified on example the stack upgrades
(because i didn't know if can be too huge or not)