It only took them 2.5 years after Segwit activation to do it.
I guess it's about time that we see exchanges supporting segwit, either the native one starting with bc1 (bech32) or 3 (P2SH nested segwit).
Gemini, Bitfinex, and some others have been supporting bech32 address generation since last year. It's certainly a welcome sight. Since exchanges are a huge part of the economic majority, we need them to actually use Segwit in order for the network to take full advantage of Segwit's block size increase.
When Coinbase, Binance and BitMEX finally join the party with full Segwit support, things should get pretty interesting.