Vendors running build farms into perpetuity so that end users can use their hardware with new kernels does seem impractical from where I'm standing, yeah.
I don't see vendors supporting their hardware for more than a few years if new kernels need new module builds regularly.
Am I misunderstanding what you were talking about?
Yeah I guess we just don't agree on what's practical. For a million dollars over the course of, let's say, five years for support, you could get someone to do this job.
AMD, Nvidia, Broadcom, Virtualbox, VMware, Dell, and Realtek using DKMS for their closed source drivers today, is also where I'm coming from.