Are there any exchanges, that matter, left that doesn't support Segwit?
I think there are a few services that are quite popular, but they still not support SegWit. I read that
Binance is one of them, but also very popular blockchain.com and BitPay. Maybe they do not care too much for their users, or they like to take more fees when they withdraw, but they can set fixed withdraw fees even with SegWit.
Bitpay already supports Segwit, although it promotes Bitcoin Cash as a zero-fee, faster alternative. Easy to trick the newbies with this.
Blockchain.info, no Segwit, but started accepting Ethereum, Bitcoin Cash, Ripple, and Stellar. Really clear what side its people are.
I believe both are anti-Bitcoin.
Not clear on Binance.