I wonder what distinguishes these kinds of communities over others. Some, like 'decentralization' or 'privacy' or 'security', require absolute adherence. If you're building a decentralized tool or a privacy tool or a security tool you must first reinvent the universe. Post on HN? Centralized, privacy nightmare, insecure. Use Gmail as your email provider? Centralized, privacy nightmare, insecure. Fastmail? Centralized. Run your own mail provider? Cool, on a cloud? Centralized, privacy nightmare. On your own infra? Centralized, bus factor 1.

Sort of an interesting market signal. "Don't bother building for me unless you're absolutely pure". Funny stuff.