The 200kb is already an underestimate. If you search temporal date polyfill and check the js size. It's 200kb for 'single' language. Date is much more complex than you expect.
And even yourself don't use it. The library authors will. There will be someday that people take the existence of temporal date api for granted. And you have no choice but import the polyfill if you want to deal with old browsers.
And even yourself don't use it. The library authors will. There will be someday that people take the existence of temporal date api for granted. And you have no choice but import the polyfill if you want to deal with old browsers.