You acknowledge contributions from several large companies. It's obvious it won't go away if Google pulls support or anything. Perhaps the fact that some random folks across the internet don't feel compelled to submit patches is simply due to the low level nature of the project and that it does the job quite well and its scope is limited by its nature, thereby limiting the need for customization by every individual. I really wonder what the standard is. If I recall correctly, for instance a certain proxy graduated by CNCF was such crap at one point that it linear searched routes. That naturally necessitates contributions if you actually use such software in production at scale.