It's almost like there are genuine UX improvements being done
People want faster software... until they are confronted by challenging decisions. JavaScript can be very fast. JavaScript, in the browser, reports a page load of about 0.06 seconds for my large personal SPA and that includes state restoration. That is determined by using: performance.getEntries()[0].duration in the browser.
When conflicts arise people most frequently become emotional and complain about the situation than make any decision towards resolution one way or the other. That is a psychological problem called cognitive conservatism[1]. About the half the time that emotional output is some form of deflection, such as hostility. Cognitive conservatism is only allowed to exist when there is insufficient pressure on the thought leaders to impose a resolution.
Its okay to say you don't really want to be faster.
[1] https://en.wikipedia.org/wiki/Conservatism_(belief_revision)
See also cognitive complexity: https://en.wikipedia.org/wiki/Cognitive_complexity#In_psycho...
Please consider that it is your own behavior which leads to these responses. When you are getting repeated "hostile" reactions from everyone you try to state your case to, instead of insisting that everyone else is wrong, it might be wise to look inwards and ask yourself if you are the problem.
It is interesting that you claim that the only reason you can think of that people disagree with you that they are emotional. Have you considered that you might be wrong?