Ya layering is largely consumer conditioning by marketers/hold over from way back when, when materials and tech were way behind where they are today. I currently have a thin shell with full venting and a 20k/20k with full venting. That covers literally 100% of all rideable temps. Was at Whitefish with windchills well below 0F and the toes were the real issue but even then it was never more than a mild inconvenience.
I'd personally dump your ventless L1, it's unacceptable for any jacket these days to not offer venting and just limits the jacket so much.
I'd personally dump your ventless L1, it's unacceptable for any jacket these days to not offer venting and just limits the jacket so much.