Yeah youre right! no CEX is flawless Binance, OKX, Bitget, Bybit, Kucoin and many more theyve all had downtime before. Thats why I always keep accounts on a only limited cex, it’s just smart risk management and same way you diversify assets. Relying on one exchange is not good. But its always better to keep the funds or asset on a non custodial wallet for maximum protection.
Non custodian wallets has always been best to hold funds that's not protected to execute projects in the short time if truly want to stay psychologically healthy and safe wise with our funds secured in the long with the amounted attempts of scammers invasions on the centralized exchange.
And while exchange may offer these trading features services, traders should always consider the platforms reputations taking users conveniences a prior. I've only used few few exchanges as Binance, Bybit and Bitget for my trades and I'm much comfortable with them because they usually send alert messages whenever they want to do technical or system services in their platform. That'll help users to migrate to other convenient platforms to do their trading tasks with an early inform so that users doesn't get trapped.