Not sure if it's just on mine but when I googled decred block explorer it gives me the testnet one first and the mainnet isn't even close to it anywhere. I only noticed this cause I was making sure my address still had the airdrop and got paniced for a bit when it would only show 0, until I realized it was the testnet.
Testnet will continue to be a testing ground for new features, so I personally feel like it makes sense to keep the testnet block explorer up. Google will correct itself as more people search and click the mainnet version.
Yeah, makes sense. I just saw that it easily can confuse people, so maybe add some warnings or some markers that make it easier for people to realize its the testnet version.