Very, if only because you'd have said I'm not sure how impressed I should be about saving 4.5 MB these days not all that long ago. Remember when emacs was backronymised to 'eight megabytes and constantly swapping'? That was also not all that long ago. Now 8 megabytes is what some pissant JS library takes as part of some miserable npm package used to bellyflop an ad into your browser window.