[wyager]

This is an excessively simplistic first-order explanation of the mining incentive system.

Consider that miners also lose money if the thing they are mining loses value. Therefore, if enough economic actors (besides miners) switch to version B that has some new feature, everyone will want to use version B instead of version A. The miners who are stuck mining version A lose money because the currency they're mining is no longer as valuable.

Realistically, the economics of cryptocurrency features work out quite nicely. You can't just say "oh, the miners make the blocks, so they have absolute control".