Dealing with the upstream linux community is a painful, time-consuming process. A lot of hardware vendors would rather just not bother, and release their sour

Dealing with the upstream linux community is a painful, time-consuming process. A lot of hardware vendors would rather just not bother, and release their source code to maintain GPL compliance, but never attempt to upstream anything because the process is so time consuming, with little to no immediately apparent upside. This is especially true if they are a parts supplier with a handful of large customers who don't care about upstream support.