I saw that generic peripherals does use the ResourceLocation for the type. I would request to change this, like with getType in IPeripheral.

Only took 5 months! Release is still a while away, so open to feedback on the API, etc...

I think the plan long-term is to allow peripheral.getType to return multiple values, effectively primary type (i.e. disk, minecraft:chest) plus additional traits (inventory), effectively allowing you to do things like peripheral.find("inventory") instead of the current mess of things.

Because I want to change my proxy system to a generic system, I want to ensure that older programs will work with the new system.
I know, that modding takes some time and that everyone has a reallife. I just want to ask, when could this feature be expected?

I just want to ask, when could this feature be expected?

Not clue I'm afraid. Hopefully next release, but I genuinely don't know how hard this'll be to implement.

Given this and #839, we probably need a priority system too for generic peripherals, so there's some determinism in which methods are chosen. But then we get into the same issues as dan200/ComputerCraft#153, which I really wanted to avoid.

I had an Idea. I could create a class which implements IPerpiheralProvider to register my peripherals for other blocks.
I will try that, would maybe be a better way