Why cutting off anyone
As 50% of transactions are segwit, ChipMixer would be more private if nobody knows which address format it is using. For now, everyone can know for sure that 50% of the transactions are not CM chips.
Correct, and I talked with Chipmixer and for now they don't have any intention of using Bech32 address format.
You should add Exodus wallet. They give bc1 address and also allow the creation. They also give legacy wallet address. So their wallet feature is ok.
This is the list of wallets and services that DO NOT support bech32 bc1 address format, so I won't add Exodus.