People are rarely willing to adopt 10% improvements. Every improvement, no matter how small, needs to be taught to the larger community of users and other stakeholders; it is relatively rare for you to be the sole stakeholder, and thus the cost of adopting the improvement is rarely worth the improvement itself, endangering making improvements. Only 10x-style improvements have a good chance of widescale adoption. Thinking that you can short-circuit this by passing 10% improvements in widely adopted languages is the mark of someone who never tried to get language features like the "var" keyword adopted in multi-million-line Java codebases.