By what criteria do you evaluate "the best explorer for Bitcoin BTC"?
What features should an explorer have to receive the “best” status?

I used to use blockchain.com, but now for some reason this site doesn’t open for me, so I also use https://blockchair.com/bitcoin more often.

It seems to me that these explorers are fundamentally not much different from each other (except in design).

Here is one of the alternatives https://blockstream.info/, but it seems to me that there are more than a dozen similar ones on the Internet.