I don't see a reason to think that Ethereum is definitely like tcp/ip rather than e.g. like operating systems, social networks, browsers, programming languages

I don't see a reason to think that Ethereum is definitely like tcp/ip rather than e.g. like operating systems, social networks, browsers, programming languages etc. Ethereum is the best bet for the leader in the space (it already is) but some of the competitors bet on having different paradigms with different advantages rather than just lower fees e.g. ADA or SOL, and I don't see a reason for certainty that there'd be only 1 big success even if it's possible.