User nodes can delete blockchains. change their user agent.. .. all meaningless
they just become useless to the network

the actual economic nodes (exchanges/merchants) that people actually spend funds with are more important. whatever direction, block, transaction format economic nodes choose:
pools follow them else pools cant spend their rewards/convert their rewards on exchanges.
Users cant spend funds if merchants/exchanges are not on the same ruleset so users follow merchants/exchanges

so the merchants/exchanges are the generals(making orders). pools are the sergeants(organising the grunts). and users are the grunts