UTF-8 vs Windows-1251. What is better to use?

Question

Character encoding

Good afternoon. Recently there was a question about the best encoding for my site (written in PHP).
I rummaged all over Google, but mostly the articles are very old, almost 10 years old.
I would like to know the current situation, who uses what and is it convenient?

Answer 1

UTF-8

Answer 2

UTF-8

Answer 3

Windows-1251
Users are always interested in completing quests to find the required encoding on their system and their browser.