You could take that attitude, but no further support means that as the bad guys find vulnerabilities MS ain't going to patch them for you. Now ditto applies to Chrome, except worse, they say their browser won't run at all. But you could use another browser if one of the others still support Vista.
Personally I don't like getting out of support. I don't upgrade for the fun of it as I think it has more than an element of pushing you into paying more again for much the same thing as you already had. (In a perfect world it would never need updates and work fully secure from day one.) But in practice getting patches and retaining compatibility is important.
You could find you run out of browser options that will work properly eventually. Might be time to buy into Win7 and get a "free" upgrade to Win10 ?