The future of NGINX

Huh ? You apparently weren't there in 2015 when it was time to send proposals for HTTP/2, nor when SPDY was used as a starting point and heavily modified. No, HTTP/2 is not Google, it's the HTTPbis WG at the IETF, animated by a few tens of knowledgeable client, server, proxies implementers. Discussions were sometimes quite heated but that resulted in an overall good enough design for the time spent on it (yes, time was key because SPDY was going to become the next standard). HTTP/3 and QUIC also come from this group and a new one (quicwg, sharing a large part of participants) and took a long time to mature. It's not Google's anymore either (in Google's original version now called gQUIC there was no separation between the HTTP and the transport layer for example).

So please don't refrain from using protocols just for your fear that they could give someone else more power. Use them if they bring you or your users some value.