Is it necessary or no longer necessary for everything to work correctly in IE 6,7 and 8?

Question

Browsers

If in these versions it is not displayed as it should, then what should I do?

Answer 1

I would say this: 6-7 have already been buried completely and irrevocably, but 8 may still be needed sometimes . Just sometimes. By default, IE11+ is now generally supported. If extended support is needed (for example, a library of general use), then IE9+. G8 support - these are rare specific situations, you need to look at the specifics of the audience and the requirements of the customer.

Answer 2

if your requirements do not say anything - score.

Answer 3

Depends on the audience, state institutions are still "junk".

Answer 4

Requirements are often written by technically illiterate people. IE8 is long dead. While IE11 is alive.
But you need to ensure minimal readability on IE.