Its still a reliable and trusted exchange than the rest that are just coming and lists different set of altcoins. Bittrex's popular decreased overtime when Binance started to emerge. Last year's were the years of bittrex,poloniex and other exchanges on their prime. I wouldn't be surprised if next year Binance starts to decrease their popularity and another new exchange will be recognized to be good.
The service can't be "reliable and trusted", when customers funds are kept because of their TOS changes without prior notice and the chance for withdrawal. That is not a legal practice in my eyes and carries the risk, that they change again their rules and keep also the funds of their current few customers, they still have.