I'm disappointed that your investigation stops as soon as you remove the MUI components, and that without any further investigation, you decide that MUI is just a bad library and should be avoided by everyone.
Did you put any effort into figuring out why the component was killing rendering performance? I'm guessing you had some variable that was affecting the JSS object, which in turn was causing the dynamic stylesheets to be updated on every scroll event. Just a guess.
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I'm disappointed that your investigation stops as soon as you remove the MUI components, and that without any further investigation, you decide that MUI is just a bad library and should be avoided by everyone.
Did you put any effort into figuring out why the component was killing rendering performance? I'm guessing you had some variable that was affecting the JSS object, which in turn was causing the dynamic stylesheets to be updated on every scroll event. Just a guess.