Why HTML5 comes?

Question

Is HTML4 having any drawback?

Answer 1

There is always improvement. One day HTML5 will also be yesterday's technology.

Answer 2

HTML5 has a lot of new features (new elements, video, audio, API...):
https://www.sololearn.com/learn/HTML/2211/

Answer 3

Its like upgarding like we do with android softwares or windows software because after upgrading it gives more features and more stable that same thing applys here .....