I think the better solution would be to have a simpler more robust web standard and some way to load other functionality to extend things by the browser to maintain backward compatibility (unlike usual polyfill the browser could decide to load that code directly if needed) so that the core could be small and this could be used by all browsers. This would give rise to new browser engines and also make browsers faster and less memory intensive since there is less things optimize for.
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I think the better solution would be to have a simpler more robust web standard and some way to load other functionality to extend things by the browser to maintain backward compatibility (unlike usual polyfill the browser could decide to load that code directly if needed) so that the core could be small and this could be used by all browsers. This would give rise to new browser engines and also make browsers faster and less memory intensive since there is less things optimize for.