If you still have lots of Internet Explorer visitors, then probably not. Just because Microsoft does not support it any more, does not mean nobody is using it any more.
On the other hand, Internet Explorer’s market share seemingly really is down to 1 to 2 percent.
That being said, many of the Chinese browsers do not seem to support TLS 1.3 yet.
But if your visitors are using mostly Western mainstream browsers, then you can probably safely use TLS 1.3. You could have done so probably for a while already
Anyway, Internet Explorer 6 was a pretty darn good browser and I thank it for its service